Stifles rhymes with:
kreifels, rifles, schreifels, trifles, baffles, faithfuls, hopefuls, kreifels, lichtenfels, muffles, ophuls, panfuls, raffles, rifles, ruffles, schreifels, scuffles, shuffles, sniffles, stoffels, trifles, truffles, useful's, waffles, wyffels
Stifles sounds like:
sheathbills, stabilize, stabilizes, stables, staphylococcus, staples, stathopoulos, steeplechase, steeples, stoffels