Niner rhymes with:
bodensteiner, breiner, briner, bryner, byner, criner, decliner, designer, diner, einar, feiner, finer, greiner, griner, heiner, hiner, kiner, kleiner, kreiner, kriner, leiner, liner, meiner, minar, mineer, miner, minor, piner, recliner, refiner, reiner, rhyner, riner, ryner, scheiner, schreiner, schriner, shiner, shreiner, shriner, signer, sinar, siner, sinor, steiner, stiner, tiner, tyner, viner, weiner, whiner, winer, wyner, zeiner
Niner 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, nir, niro, nohr, noir, nomura, nor, nora, norah, norrie, norry, norway, nowhere, numeiri, nunnery, nur, nurr, nurre, nyerere, nyeri