Synonyms and related words :
affectionate, aging, apish, asinine, batty, befooled, beguiled, besotted, brainless, buffoonish, childish, childlike, cockeyed, crazy, credulous, daffy, daft, dazed, dear, declining, decrepit, devoted, dizzy, doddering, doddery, doited, dumb, easily taken in, easy of belief, fading, fatuitous, fatuous, flaky, fond, fool, foolheaded, foolish, fuddled, futile, gaga, getting on, goofy, growing old, gulled, idiotic, imbecile, inane, inclined to believe, inept, infatuated, insane, kooky, loony, lovesome, mad, maudlin, moronic, nutty, overconfiding, overcredulous, overtrustful, overtrusting, sappy, screwy, senescent, senile, senseless, sentimental, silly, simple, sinking, stupid, superstitious, thoughtless, trustful, trusting, uncritical, undoubting, unskeptical, unsuspecting, unsuspicious, wacky, waning, wasting, wet, witless,