Omaha's rhymes with:
arkansas', arkansas's, backsaws, cha-chas, grandma's, grandmas, kadrmas, laboratoires, panama's, tovaz
Omaha's sounds like:
oehmens, ohioans, ohm's, ohms, ohnemus, omans, omega, omens, ominous, onassis, onassis', onassis's, once, one's, oneness, oneok, ones, ones', onex, onex's, ong, onions, onishi, ons, onus, onyx, ounce, ounces, owen's, owens, owens's, owing, owings, owning, owns