active, auspicious, brainless, bright, brilliant, canty, chickenhearted, cowardly, cringing, dastardly, energetic, faint, fainthearted, fearful, feebleminded, gumptious, half-witted, headless, imbecile, imbecilic, indefatigable, industrious, lily-livered, lively, lucent, merry, moronic, physical, poor-spirited, promising, pusillanimous, recreant, scintillating, slow-witted, snappy, strenuous, sunny, sunshiny, teenage, timid, tireless, unflagging, unintelligent, unwearying, up-and-coming, vigorou