Oyama rhymes with:
koyama, toyama, yokoyama, akiyama, aoyama, fujiyama, fukuyama, hirayama, kashiyama, katayama, koyama, kuriyama, maruyama, nakayama, nishiyama, sasayama, sugiyama, takayama, tokuyama, toyama, yokoyama
Oyama sounds like:
o'hanian, o'mahoney, o'mahony, oana, oanh, oehme, oehmen, oeien, ohanian, ohioan, ohm, ohmae, ohman, ohmann, oien, oma, omaha, omahoney, omahony, oman, omani, omen, ommen, omni, omonia, on, ona, onan, onawa, one, one-way, oney, onion, onnen, onni, onno, ono, oona, owen, own, oyen