Flinched rhymes with:
clinched, lynched, cinched, clinched, inched, lynched, pinched, branched, bunched, cinched, clenched, clinched, crunched, drenched, entrenched, hunched, inched, launched, lunched, lynched, munched, pinched, punched, relaunched, retrenched, scrunched, stanched, wrenched
Flinched sounds like:
flanked, flimsiest, flummoxed, flunked