Superwoman rhymes with:
assemblywoman, businesswoman, catwoman, chairwoman, congresswoman, councilwoman, englishwoman, gentlewoman, noblewoman, policewoman, saleswoman, spokeswoman
Superwoman sounds like:
sabourin, sabrina, saffran, saffron, safran, savarino, schiferon, schizophrenia, seaborn, seaborne, severin, severini, severino, severn, shafran, shakespearean, shifrin, shopworn, siberian, sophronia, soprano, sovran, sparano, spearman, sperm, sporn, sprain, spreeman, spreen, spurn, subramanian, suffern, superhuman, superman, superwomen, supreme, sybron, szafran