Fixings rhymes with:
boxing's, blessings, boxing's, casings, crossings, dressings, facings, financings, grassings, lansing's, leasing's, pricings, racing's, refinancings
Fixings sounds like:
facing, facings, faking, fasching, fashion's, fashioning, fashions, fausnaugh, faxing, feagans, feagins, feigning, figgins, fijians, fishing, fisons, fixing, focusing, fosamax, fosnaugh, foxman's, fucking, fujisankei, fukunaga, fusing, fussing