Here's what rhymes with thireenth.
plinth hyacinth labyrinth Words that almost rhyme with thireenth
since sins pins wins fins bins rinse tins chins mince shins wince gins thins things kings prince rings wings limbs lymph skins hymns sings twins spins evince nymph rims violins whims grins quince dims gyms shims tings wrings begins brings swings clings florins stings flings slings swims hairpins brims skims trims convince springs strings minims javelins pseudonyms underpins offsprings wellsprings fifth myth width filth pith scythe writhed writhe sixth therewith herewith smith forthwith wherewith monolith silversmith