Arsenic rhymes with:
baranek, bartunek, beranek, dominic, dominick, formanek, jelinek, juranek, kochanek, krivanek, romanek, safranek, simonich, stefanick, stepanek, suchanek, tomanek, zemanek
Arsenic sounds like:
aerogenosa, arcanum's, arceneaux, arching, arciniega, arguing, arising, arizona's, arizonans, arkansas, arkansas', arkansas's, arkin's, arousing, arrogance, arsons, arzamas