Here's what rhymes with unwersale.
fail sale sail avail veil hail shale vale assail hale faille male scale mail pale tail tale jail nail rail frail gale whale bail stale wail bale dale pail snail flail kale unveil wale wassail trail email travail curtail inhale quail quale braille mainsail grail hightail carrell detail prevail entail exhale bewail derail gunwale topsail countervail foresail impale monorail taffrail lugsail fingernail pigtail bobtail nonpareil pellmell hangnail ponytail martingale swallowtail tattletale