Frankly rhymes with:
blankley, blankly, binkley, blankley, blankly, brinkley, brinkly, bunkley, dunkley, finkley, hinckley, hinkley, pinkley, winkley
Frankly sounds like:
fernicola, ferronickel, forensically, frankel, frankl, franzel, frenkel, frenzel, frowningly