Niro rhymes with:
deniro, nero, argiro, aufiero, biro, carriero, casimiro, deniro, dipiero, dipierro, dipirro, ero, fierro, guerriero, hero, hiro, kaneshiro, liro, masahiro, miro, miyashiro, morihiro, moruhiro, nero, oshiro, pierro, piro, pirro, ramiro, ruggiero, santarsiero, sapiro, schiro, shapero, shapiro, shoichiro, spiro, subzero, tamashiro, tashiro, tesoriero, yamashiro, yoshiro, zero
Niro sounds like:
nair, naira, namara, namer, nara, naro, narrow, narrower, nary, nauer, nayyar, ne'er, near, nearer, neary, neer, neher, nehru, neier, neimeyer, neira, nemer, nemir, neri, nerio, nero, neuer, neumaier, neumayer, neumeier, neumeyer, neuner, neuro, neurohr, newer, newmeyer, newmyer, neyer, niemeier, niemeyer, nier, nimmer, niner, nir, nohr, noir, nomura, nor, nora, norah, norrie, norry, norway, nowhere, numeiri, nunnery, nur, nurr, nurre, nyerere, nyeri