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