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