Rationalist(n.) One who accepts rationalism as a theory or system; also, disparagingly, a false reasoner. See Reasonist.
Thesaurus Entries
Averroist, Berkeleian, Cartesian, Comtist, Cynic, Cyrenaic, Eleatic, Epicurean, Eretrian, Fichtean, Hegelian, Heideggerian, Heraclitean, Herbartian, Humist, Husserlian, Kantian, Kierkegaardian, Leibnizian, Marxist, Megarian, Neo-Hegelian, Neo-Pythagorean, Neoplatonist, Parmenidean, Peripatetic, Platonist, Pyrrhonist, Pythagorean, Sartrian, Scholastic, Scotist, Socratist, Sophist, Spencerian, Spinozist, Stoic, Thomist, Wittgensteinian, adhesive, agnostic, animist, appendage, applauder, appreciator, attendant, backer, barnacle, booster, bramble, brier, buff, bulldog, burr, cavaliere servente, cement, champion, claqueur, cohort, commender, cosmotheist, courtier, creature, dangler, decal, decalcomania, deist, dependent, dialectical materialist, disciple, dualist, dummy, eclectic, egoist, empiricist, encomiast, essentialist, eulogist, eulogizer, existentialist, extoller, fan, figurehead, flunky, follower, following, gillie, glue, goon, gunk, hanger-on, hedonist, heeler, henchman, homme de cour, humanist, hylomorphist, hylotheist, hylozoist, idealist, immaterialist, individualist, intuitionist, jackal, lackey, lauder, leech, limpet, logical empiricist, man, materialist, mechanist, mentalist, minion, molasses, monist, mucilage, myrmidon, mystic, naturalist, nominalist, ontologist, organic mechanist, organicist, panegyrist, panpsychist, pantheist, parasite, partisan, paste, physicist, plaster, plugger, positivist, pragmatist, praiser, prickle, promoter, psychist, public, puffer, puppet, pursuer, pursuivant, rationalist, realist, remora, retainer, rooter, satellite, sectary, secular humanist, sensationalist, sensist, servant, shadow, skeptic, sticker, stooge, substantialist, successor, supporter, sycophant, syncretist, syrup, tagtail, tail, theist, thorn, thug, tout, touter, trainbearer, transcendentalist, upholder, utilitarian, vitalist, voluntarist, votary, ward heeler, zetetic