Painful rhymes with:
disdainful, gainful, cranfill, disdainful, gainful, grenfell, mournful, panful, scornful, sinful, stanfill, teaspoonful, tuneful
Painful sounds like:
painfully, pampel, panfil, panfile, panful, panoply, panphila, pemble, penfil, pimple, pinball, pineapple, pompilio