Ferments rhymes with:
ciments, laments, mentz, bentz, brents, cents, ciments, circumvents, consents, dents, descents, discontents, dissents, entz, event's, events, frentz, gent's, gentz, hentz, intents, invents, jentz, kent's, krentz, laments, lents, lentz, lentzsch, lorenz, malcontents, mentz, misrepresents, pentz, percents, prevents, rents, rentz, repents, represents, resents, scents, sentz, slentz, stentz, tents, trent's, vents, wentz, zentz
Ferments sounds like:
fahrenheit's, farmhands, fermenta's, fernandes, fernandez, fernando's, forehands, forints, formants, formats, frantic, frantz, fremd's, fremitus, frenetic, frentz, friend's, friends, friends', fronds, front's, frontage, fronts, frontz