Fincher rhymes with:
clincher, mincher, pincher, tincher, adventure, bencher, bonaventure, clencher, clincher, cruncher, debenture, denture, eurodebenture, fancher, hancher, hrncir, indenture, launcher, laventure, licensure, mencher, mincher, misadventure, pincher, provencher, quencher, rancher, rencher, tincher, trencher, venture
Fincher sounds like:
fancher, fancier, fanger, fankhauser, favinger, fenger, financer, financier, financiera, financiere, financiero, finanziaria, finanziario, finger, finisher, finocchiaro, finscher, foncier, fonger, funkhouser