Ons rhymes with:
afrikaans, alphonse, azerbaijan's, batons, bonn's, brons, bronze, come-ons, cons, don's, dons, donze, fons, fonz, goings-ons, han's, hons, hwan's, jahns, john's, johns, jon's, kahan's, kahn's, kazakhstan's, khan's, konz, lat-lons, lian's, livan's, lons, milan's, nithuekan's, omans, pons, put-ons, ron's, run-ons, saint-saens, salons, schons, sohns, sons', spawns, st-johns, swann's, swans, taiwan's, teheran's, teherans, tehran's, tehrans, try-ons, vons, yuan's, yvonne's
Ons 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, onishi, onus, onyx, ounce, ounces, owen's, owens, owens's, owing, owings, owning, owns