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