Postrelle rhymes with:
strehl, strehle, cantrell, cantrelle, cottrell, dantrell, futrell, strehl, strehle, arel, cantrell, cantrelle, carel, corel, corell, cottrell, dantrell, ferrel, frel, futrell, grell, grelle, irell, krell, mirell, morrell, prell, sharell, shirell, shirelle, strehl, strehle, torell, tyrrell, warrell
Postrelle sounds like:
pastoral, pectoral, pictorial, postrel