Synonyms to pent-up

arrested, babbling, back, backward, behind, behindhand, belated, blithering, blocked, bridled, burbling, callow, caught, charmed, checked, coarse, constrained, controlled, crackbrained, cracked, crazy, cretinistic, cretinous, crude, curbed, defective, deficient, delayed, delayed-action, detained, dithering, driveling, drooling, embryonic, enchanted, enthralled, failing, fascinated, fixed, gripped, guarded, half-baked, half-witted, held, held up, hung up, hypnotized, hypoplastic, idiotic, imbecile, imbecilic, immature, impeded, in a bind, in abeyance, in arrear, in arrears, in check, in default, in embryo, in leading strings, in ovo, in remission, in short supply, in the rough, inadequate, incomplete, infant, inhibited, jammed, lacking, late, latish, maundering, mentally defective, mentally deficient, mentally handicapped, mentally retarded, mesmerized, missing, mongoloid, moratory, moronic, needing, never on time, not all there, obstructed, on leash, overdue, oversimple, part, partial, patchy, rapt, reductionistic, reductive, restrained, retarded, rough, roughcast, roughhewn, rude, rudimental, rudiment