Fusion rhymes with:
confusion, diffusion, infusion, profusion, rediffusion, reperfusion, transfusion, confusion, diffusion, infusion, profusion, rediffusion, reperfusion, transfusion
Fusion sounds like:
facchini, faciane, fagan, fagen, fagin, faison, fasano, fasciano, fascism, fashion, fason, fasone, faughn, faughnan, faxon, fazzino, feagan, feagin, fegan, feigen, feighan, feigin, feign, ficken, ficom, figone, fijian, fischman, fishkin, fishman, fission, fossen, fossum, foxman, fujian, fujiyama, fukushima, fukuyama, fuson