Synonyms and related words :
bright, conceptive, conceptual, creative, discursive, esemplastic, fanciful, fecund, fertile, germinal, ideal, ideative, ideological, imaginative, ingenious, inspired, intellectual, intelligent, inventive, knowing, noetic, not so dumb, notional, original, originative, pregnant, productive, prolific, rational, reasonable, sane, seminal, sensible, shaping, sophic, strong-minded, teeming, theoretical, understanding, visioned