Below is an in-progress list of terms commonly used and the definitions I have applied to them on the site. If I have made an error, I would very much appreciate any constructive criticisms to improve my understanding.
aggression — an act (or an objectively provable impending threat) to initiate the use of coercion
agorism — an ideology asserting that the practical application of libertarianism is by means of counter-economics
altruism — a code of ethics that states the welfare of others is the standard of an individual’s own value or moral worth, or that states self-sacrifice is one’s greatest virtue
anarchy — the condition of a society without a dominant political institution enforcing rules of conduct within a given geographical area
anarchism — an opposition to political authority; a belief that the abolition of the state and all other political hierarchies are an indispensable condition for complete (political) liberty
autarchy — a society in which each individual rules him- or herself
authority — the obedience commanded by one’s will; the right to command obedience
authoritarianism — a belief that someone is ethically or politically superior because he or she has or claims to have such authority
autistic — involving only one individual (e.g., autistic exchange)
autonomy — the condition of being beyond external control
axiom — a statement that identifies a fundamental base of knowledge; an irreducible statement of knowledge that one assumes true in the very act of trying to refute it
axiomatic concept — a non-reducible primary fact of reality that is implicit in all other knowledge
bureaucrat — an employee whose actions are governed by rules or laws established by a higher authority
capitalism — a social system of individual rights, including property rights, in which the factors of production are furnished privately
capitalism, laissez-faire — a capitalist system in which individual rights are fully upheld
catallactic competition — a market economy wherein each participant strives to excel in one particular trade or skill to satisfy the desires of others for monetary gain
coercion — an act by an individual against the will or without the permission of another human being with respect to that which the human being has rightful control, such as his or her body or property
collectivism — a belief that an individual exists to serve the well-being of a group; the belief that moral dignity or political autonomy (sovereignty) is made on the basis of the group a person is identified as being in
collectivist anarchism — a stateless society whereby the means of production are owned and operated in common
conflationism, left — the criticism of corporate power and plutocracy and other grants of government privilege as if they were the consequences of a genuine free market
conflationism, right — the praise of the virtues of a free market as though they constituted a justification for past and continued government-enforced privilege
consensual crime — an arbitrary dictate to coercively punish mutually consensual acts
constitutionalist — one who believes a government is just or proper to the extent that it strictly adheres to its constitution
conventional politics — traditional means of trying to reform the political system (i.e., electoral politics, lobbying and petitioning)
counter-economics — the practice of participating in consensual economic activities prohibited by the state
citizen — an individual who owes allegiance to a government in exchange for an obligation of protection by the government
crime — a violation of an individual’s rights
de facto — in fact; in reality
deflation — a substantial decrease in the quantity of money in an economy over a given period of time, which typically results in an increase in the purchasing power of a monetary unit that would otherwise take place
de jure — by law; by decree
direct action — actions that sidestep regulations and electoral representation to accomplish goals directly (i.e., agorism, mutual aid, education, strikes, and boycotts)
economics — the science of discovering the meaning and consequences of purposeful human action with respect to (scarce) resources
electoral politics — seeking to achieve political goals by campaigning to elect favorable candidates for political office
entrepreneur — one who acts to achieve a more desirable future situation than he or she thought possible by taking another action or no action at all; the first recipient of a profit or a loss of an economic action
epistemology — the theoretical science concerned with the discover, method, and validity of human knowledge
ethics — a branch of philosophy concerning the proper course of action for human beings
faith — the acceptance of a belief that lacks empirical or logical evidence of its validity or (more often) the acceptance of a belief in something in spite of the available empirical and logical evidence
force — see “coercion”
free market — the metaphorical venue for the consensually regulated exchange of goods and services
goods — the concrete means that directly or indirectly satisfy human wants or serve the achievement of human ends
government — the individuals and their actions as representatives of the state
human nature — the distinguishable characteristic of a distinct being with a volitional consciousness who possess the faculty of reason
ideology — a set of beliefs
individual — a natural person, his or her rightful agent or agents, or a voluntary group of individuals and their rightful agent or agents
individualism — the belief that individuals retain the highest political autonomy within society or that each individual has values of his or her own, which he or she is entitled to consensually achieve and maintain
individualist anarchism — the belief that the benefits of a stateless society can be most effectively attained by emphasizing individual autonomy
inflation — a substantial increase in the quantity of money in an economy over a given period of time, which typically results in a decrease in the purchasing power of a monetary unit that would otherwise take place
injustice — not treating others as their actions reflect they deserve to be treated, a violation of the rights of others
justice — the absence of injustice; an act of giving one his or her due or that provides restitution for a past injustice
labor — expended human energy
laws of logic — conceptual integrations that describe existence as a conceptual whole
libertarianism — the ideology that upholds liberty as the utmost political value
liberty — the absence of coercion; the independent exercise of one’s judgement in a social context
logic — the language, method and process employed to guide reason within a given field or situation
market anarchy — an anarchic social system whereby justice and defensive services are provided by privately owned enterprises
materialism — the belief that all of existence is ultimately reducible to matter
minarchism — a social system whereby the only purported role of the state is the defensive protection of individual rights
mixed economy — an economic system enforced by a state that contains elements of a market economy and a command economy
moral knowledge — a grasp of the facts of reality that relate to the requirements of human life
moral value — a fact in relation to the requirements for life (The decision to live makes all other choices possible, so an individual’s life must be his or her ultimate value if he or she chooses to live.)
morality — see “ethics”
morally proper — that which is necessary to serve an individual’s ultimate end, which is an individual’s own life
mutualism — a social system in which ownership is distributed according to one’s direct use of a property
natural law — the application of the principle of natural rights based on the the universal, constant, discoverable, and tangible nature of human beings
natural rights — a social theory which prescribes the congruent necessary condition (the absence of aggression) for individuals to most beneficially cooperate with others in a social context
non-aggression principle — a ethical principle which recognizes the initiation of force as illegitimate but which makes no value claim on retaliatory force
non-violent crime — see “consensual crime”
ownership — the rightful control of an entity one values
peace — the widespread and sustained absence of coercion among individuals
politics — the branch of philosophy concerning the principles by which an individual ought to function with respect to others
power — the capacity to bring about one’s goal
power, economic — power exercised by economic means
power, political — power exorcized by political means
power, social — power exorcized by social means
pragmatism — the belief that principles are valid to the extent they can be applied to achieve an intended end
praxeology — the general theoretical science of discovering the meaning and consequences of purposeful human action
profit — the net gain of contemplated human action
property — the ownable means of economic action
reason — the faculty that identifies and integrates the material provided by Man’s senses, allowing him to become a conceptual being
retaliatory force — the use of force to defend against an initiation of coercion
right — a moral principle defining and sanctioning a man’s freedom of action in a social context; a principle regarding how people should be free to act
rightful control — the ability to use in such a way that does not violate the rights of others
social contract (compact) — a purportedly implicit agreement by individuals in society that obliges them to commit certain obligations
socialism — a social system in which rights are vested into society as a whole
society — peaceful cooperation among a group of individuals
state, the — the dominant political institution with the ultimate decision-making authority of enforcing certain rules of conduct within a given geographical area
stateless society — a society without a state
statism — the believe that sovereignty (or political autonomy) rests in the state or that individuals exist to serve the well-being of the state
trade — the voluntary act of exchanging ownership rights
value — that which one acts to gain or keep; a goal
value, life-promoting — facts as it relates to the requirements for human life
valuable — the magnitude by which a value contributes to one’s goal
vice — an immoral or purportedly immoral act that does not violate the rights of another individual