Nicest rhymes with:
acusyst, aerodynamicist, astrophysicist, bassist, ethicist, lyricist, narcissist, pharmacist, physicist, publicist, racist, sexist, supremacist
Nicest sounds like:
nagata, nagged, nakata, naked, nast, nasta, nasty, naught, naughty, nauseate, nauseated, necessitate, necessitated, necessity, necked, necktie, negate, negated, negotiate, negotiated, nesseth, nest, nesta, neste, nestea, nested, neustadt, newest, newgate, newgateway, newquist, newscast, newsday, next, nicety, nicked, niezgoda, night, nikita, niquette, nishida, nist, nixed, njt, noisiest, nonjet, nonunionized, nosed, nuanced, nugett, nugget, nunziata, nunziato, nyquist