English reason, reason out, aim, conclude, ground, intellect, logical reasoning, mind, motivation, purpose, cause, excuse, rationale, rationality, argue, understanding
French raisonner, cause, raison, abord, conclure, entendement, intellect, motif, motivation, motiver, sagesse
why, irrationality, madness, why not, unreason, random, bedlam, insanity, lunacy, craziness, rabidness, folly, fury, rabies, casual, how come, aleatory, arbitrary, average, pseudorandom, stochastic, force, rando, randy, what's up with, what for, wherefore