THESAURUS
ratiocination
abstract thought, act of thought, brainwork, cerebration, cogitation, conceit, conception, conceptualization, conclusion, creative thought, deduction, deductive reasoning, demonstration, discourse, discourse of reason, discursive reason, excogitation, headwork, heavy thinking, idea, ideation, illation, imageless thought, induction, inductive reasoning, intellection, intellectual exercise, intellectualization, judgment, logical thought, mental act, mental labor, mental process, mentation, noesis, philosophy, proof, rationalism, rationality, rationalization, rationalizing, reason, reasonableness, reasoning, sequitur, sophistry, specious reasoning, straight thinking, sweet reason, thinking, thinking aloud, thinking out, thought