Arzamas rhymes with:
bahamas, commas, damas, dramas, lama's, lamas, llamas, mama's, mamas, murayama's, pajamas, stamas, tamas
Arzamas sounds like:
aerogenosa, arcanum's, arceneaux, arching, arciniega, arguing, arising, arizona's, arizonans, arkansas, arkansas', arkansas's, arkin's, arousing, arrogance, arsenic, arsons