Bonaventure rhymes with:
adventure, bencher, clencher, clincher, cruncher, debenture, denture, eurodebenture, fancher, fincher, hancher, hrncir, indenture, launcher, laventure, licensure, mencher, mincher, misadventure, pincher, provencher, quencher, rancher, rencher, tincher, trencher, venture