Propel rhymes with:
aix-la-chapelle, capelle, chapell, chapelle, chappelle, lapel, riopel, aix-la-chapelle, apel, capelle, chapell, chapelle, chappelle, compel, dispel, dispell, expel, faupel, harpel, impel, lapel, misspell, pehl, pell, pelle, rampell, repel, riopel, spell, vaupel
Propel sounds like:
parable, parabola, parboil, powerball, powerful, powerfully, prayerful, prebble, preble, prevail, preval, pribble, pribula, pribyl, probable, probably, profile, provable, purple