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