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