morality, righteousness, justice...

duty, obligation, responsibility

doctrine, rule, principle...

meaning, significance

justice, right, righteousness...

name (esp. on a deed, contract, etc.)...

father-in-law, foster father, stepfather

duty, sense of duty, honor...

lecture

definition

discussion, argument, debate

mother-in-law, foster mother, step mother

exclusivism, exclusionism

feudalism

manners, courtesy, etiquette

communism

capitalism

significant, useful, meaningful...

socialism

democracy

heroism, loyalty and courage

militarism

faith, fidelity, loyalty

doubt

brother-in-law (spouse's older brother or older sister's husband), older stepbrother

brother-in-law (spouse's younger brother or younger sister's husband), younger stepbrother

original meaning

advocate (of a theory or principle), ideologist, ideologue...

morality, moral principles

great cause, moral law, justice