Umlasi rhymes with:
diblasi, galassi, losey, abbasi, anastasi, basi, benassi, biasi, byassee, cacaci, cortopassi, cossey, debiase, degrasse, delrossi, demasi, dibiase, diblasi, dimasi, distasi, dosie, dossey, eminase, fossey, galassi, gerbasi, gervasi, lacasse, lagasse, lambiase, losey, masi, mosie, mossey, nastasi, posse, quasi, stasi, terrasi, tomasi, tomassi
Umlasi sounds like:
unleash, unleashes, unless, unlike, unlock, unlucky