Fanciest rhymes with:
juiciest, raciest, ritziest, sexiest, angriest, atheist, bloodiest, blotchiest, blowiest, busiest, cheeriest, chilliest, craziest, deadliest, dirtiest, earliest, easiest, flashiest, flightiest, flimsiest, fluffiest, foggiest, friendliest, funniest, grooviest, handiest, happiest, hardiest, heartiest, heaviest, heftiest, jolliest, juiciest, junkiest, laziest, likeliest, lobbyist, luckiest, mightiest, nastiest, noisiest, prettiest, raciest, rainiest, riskiest, ritziest, rustiest, scariest, sexiest, showiest, silliest, skimpiest, skinniest, sloppiest, smoggiest, sniffiest, stealthiest, steamiest, stickiest, thorniest, tiniest, trickiest, ugliest, wealthiest, worthiest, zaniest
Fanciest sounds like:
famished, fancied, feminist, fenced, financed, finessed, finest, finished, finstad, fumigate, fungicide, funnest, funniest