Here's what rhymes with threetenth.
tenth Words that almost rhyme with threetenth
dense tense tens pence pens dens gens sense hence lens thence whence fence gems hens pretense fens defence defense intense immense offence offense stems suspense cleanse glens halfpence hems expense commence dispense incense condense sixpence twopence condemns recompense theorems harems recommence morphemes commonsense frankincense death depth health wealth breath breadth stealth neath length twelfth strength shibboleth commonwealth