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