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