Focusing rhymes with:
refocusing, refocusing, refocusing, buttressing, canvassing, embarrassing, encompassing, grimacing, harnessing, menacing, necklacing, practicing, promising, purchasing, refocusing, repurchasing, resurfacing, surfacing, witnessing
Focusing sounds like:
facing, facings, faking, fasching, fashion's, fashioning, fashions, fausnaugh, faxing, feagans, feagins, feigning, figgins, fijians, fishing, fisons, fixing, fixings, fosamax, fosnaugh, foxman's, fucking, fujisankei, fukunaga, fusing, fussing