Rancidity rhymes with:
lucidity, cupidity, illiquidity, lividity, lucidity, stupidity, conticommodity, cupidity, fecundity, illiquidity, lividity, lucidity, nudity, stupidity
Rancidity sounds like:
raincoat, rainiest, ramstad, rancid, ranged, ranked, ransacked, rearranged, reenact, reenacted, rehnquist, reinstate, reinstated, reinstitute, reinstituted, reminisced, renegade, reneged, renegotiate, renegotiated, renounced, renquist, renunciate, renuzit, ringed, ringgit, ringquist, ringside, ringstad, ringuette, ringwood, ronstadt, rummaged, runquist