Petr rhymes with:
petre, petter, pipetter, better, bettor, debtor, detter, etter, fetter, fretter, geter, getter, jetter, ketter, letter, metter, mettur, netter, petre, petter, pipetter, retter, schetter, setter, shetter, stetter, sweater, tretter, tschetter, vetere, vetter, wetter, yetter
Petr sounds like:
padre, padro, pater, patera, patrie, patry, patter, pedro, peter, petery, petra, petre, petrea, petree, petrey, petri, petrie, petro, petrow, petru, petry, petter, pettry, pewter, phedra, piedra, pieter, pietro, piotter, pipetter, pitre, pituitary, poetry, poitier, poitra, pothier, potier, potter, pottery, poudrier, pouter, poutre, powder, powdery, powter, puder, puppeteer, puppetry, putter, putterer