Onishi rhymes with:
konishi, konishi, nakanishi, nishi, kishi, konishi, mitsubishi, nakanishi, nishi, oishi, shiraishi, vichy
Onishi sounds like:
oehmens, ohioans, ohm's, ohms, ohnemus, omaha's, omans, omega, omens, ominous, onassis, onassis', onassis's, once, one's, oneness, oneok, ones, ones', onex, onex's, ong, onions, ons, onus, onyx, ounce, ounces, owen's, owens, owens's, owing, owings, owning, owns