Here's what rhymes with intervail.
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 travail wail bale dale pail snail flail kale unveil wale detail trail prevail email curtail inhale quail quale bewail braille derail mainsail topsail countervail grail taffrail wassail hightail carrell entail exhale fingernail gunwale pigtail foresail impale monorail bobtail pellmell lugsail ponytail martingale nonpareil hangnail swallowtail tattletale