Tinier rhymes with:
barganier, bernier, bonior, chenier, fournier, funnier, gagnier, gardinier, garnier, gordinier, granier, grenier, ladnier, linear, manier, meunier, minier, monier, monnier, munier, pannier, prunier, regnier, renier, saulnier, saunier, skinnier, sonier, sonnier, tavernier, trepagnier, trepanier, venier, vernier
Tinier sounds like:
tainer, tamara, tamer, tammaro, tamura, tanimura, tanner, teamer, tener, tenera, tenner, tenor, tenore, tenorio, tenure, thinner, thomure, tidmore, tiemeyer, tietmeyer, timer, timmer, timor, timur, tiner, tomaro, tomer, tomorrow, toner, tonner, toomer, towner, tumor, tuner, tyner