Upset rhymes with:
allset, anisette, bassette, beset, bessette, bissette, bresette, bressette, brissette, brossette, brusett, brusette, cassette, cosette, cossette, doucet, doucette, faucette, fisette, josette, lisette, lucette, offset, preset, racette, reset, rosette, set, sette, unset
Upset sounds like:
ubiquity, upshot, upside, upstate