Synonyms and related words :
bright, cerebral, cogitative, cognitive, concentrating, concentrative, conceptive, conceptualized, contemplating, contemplative, creative, deliberating, deliberative, discursive, endopsychic, esemplastic, excogitating, fanciful, fecund, fertile, germinal, ideal, ideational, ideative, ideological, imaginative, ingenious, inspired, intellectual, intelligent, internal, introspective, inventive, knowing, meditating, meditative, mental, museful, musing, noetic, noological, not so dumb, notional, original, originative, pensive, phrenic, pondering, pregnant, prehensive, productive, prolific, psychic, psychologic, rational, reasonable, reasoning, reflecting, reflective, ruminant, ruminating, ruminative, sane, seminal, sensible, serious, shaping, sober, sophic, speculative, spiritual, strong-minded, subjective, teeming, theoretical, thinking, thought, thoughtful, understanding, visioned, wistful