Frostings rhymes with:
broadcasting's, castings, everlastings, hastings, hustings, listings, postings, tastings, beatings, broadcasting's, castings, coatings, cuttings, everlastings, fighting's, fightings, fittings, footings, gettings, gittings, greetings, hastings, hustings, keating's, lanting's, lighting's, listings, marketing's, marketings, meeting's, meetings, outings, paintings, plantings, postings, printing's, printings, ratings, seatings, settings, shootings, sightings, tastings, underwritings, weightings, whitings, writings, yachting's
Frostings sounds like:
fabricating, fabrications, farsightedness, firestone's, forecasting, foreshadowing, forgetting, fractions, frictions, frightening, frightens, frosting