Roget's Thesaurus of English Words and Phrases by Peter Mark Roget

principle; rationality; cogitative faculties, cognitive faculties, discursive faculties, reasoning faculties, intellectual faculties; faculties, senses, consciousness, observation, percipience, intelligence, intellection, intuition, association of ideas, instinct, conception, judgment, wits, parts, capacity, intellectuality, genius; brains, cognitive powers, intellectual powers; wit &c 498; ability &c (skill) 698; wisdom &c 498; Vernunft [G.], Verstand [G.]. soul, spirit, ghost, inner man, heart, breast, bosom, penetralia mentis [Lat.], divina particula aurae [Lat.], heart's core; the Absolute, psyche, subliminal consciousness, supreme principle. brain, organ of thought, seat of thought; sensorium†, sensory; head, headpiece; pate, noddle†, noggin, skull, scull, pericranium [Med.], cerebrum, cranium, brainpan†, sconce, upper story. [in computers] [Comp.] central processing unit, CPU; arithmetic and logical unit, ALU. [Science of mind] metaphysics; psychics, psychology; ideology; mental philosophy, moral philosophy; philosophy of the mind; pneumatology†, phrenology; craniology [Med.], cranioscopy [Med.]. ideality, idealism; transcendentalism, spiritualism; immateriality &c 317; universal concept, universal conception. metaphysician, psychologist &c V. note, notice, mark; take notice of, take cognizance of be aware of, be conscious of; realize; appreciate; ruminate &c (think) 451; fancy &c (imagine) 515. Adj. intellectual [Relating to intellect], mental, rational, subjective, metaphysical, nooscopic†, spiritual; ghostly; psychical†, psychological; cerebral; animastic†; brainy; hyperphysical†, superphysical†; subconscious, subliminal. immaterial &c 317; endowed with reason. Adv. in petto. Phr. ens rationis [Lat.]; frons est animi janua [Lat.] [Cicero]; locos y ninos dicen la verdad [Sp.]; mens sola loco non exulat [Lat.] [Ovid]; my mind is my kingdom [Campbell]; stern men with empires in their brains [Lowell]; the mind, the music breathing from her face [Byron]; thou living ray of intellectual Fire [Falconer]. 450a. Absence or want of Intellect — N. absence of intellect, want of intellect &c 450; imbecility &c 499. brutality, brute force. instinct, brute instinct, stimulus-response loop, conditioned response, instinctive reaction, Pavlovian response. mimicry, aping (imitation) 19. moron, imbecile, idiot; fool &c 501; dumb animal; vegetable, brain dead. Adj. unendowed with reason, void of reason; thoughtless; vegetative; moronic [Sarc.], idiotic [Sarc.], brainless [Sarc.]. Adv. instinctively, like Pavlov's dog; vegetatively. V. mimic, ape (imitate) 19; respond instinctively.