Here's what rhymes with coctail.
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 quail hale quale braille kale grail faille wale detail scale avail entail frail email assail snail flail bewail derail pigtail impale bobtail hightail lugsail carrell prevail travail inhale exhale gunwale topsail unveil foresail monorail taffrail wassail pellmell hangnail mainsail ponytail countervail martingale nonpareil swallowtail fingernail tattletale