Defrost rhymes with:
frost, criss-crossed, crossed, frost, accost, aust, criss-crossed, crossed, embossed, exhaust, frost, glossed, lacoste, lost, maust, tossed
Defrost sounds like:
deforest, deforrest, deprecate, deprecated, depreciate, depreciated, depressed, depriest, diffract, diverged, diversity, divorced, dupriest