postulate, rule, principle, theorem; assumption, presupposition, premise.
2. aphorism, apothegm, gnome, saying, proverb, adage, saw, byword; motto, maxim, precept, dictum, axiomatic, adj. 1. self-evident, apodictic, manifestly true, patently true, unquestionable, incontestable; manifest, certain, absolute; generally known, universally acknowledged, understood, granted, given, assumed, presupposed.
2. aphoristic, proverbial, gnomic, gnomical, apo-thegmatic, apothegmatical; terse, pithy, sententious, axis, n. 1. shaft, spindle, axle, bar, mandrel, Machinery, arbor; stem, trunk, pole, rod, pin; line of rotation, central line, vertical.