Here's what rhymes with fifreenth.
plinth labyrinth hyacinth Words that almost rhyme with fifreenth
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 florins nymph rims whims grins hairpins quince dims gyms shims tings wrings begins brings springs strings swings clings stings violins flings slings swims brims skims trims convince minims javelins pseudonyms underpins offsprings wellsprings fifth myth width filth pith scythe writhed writhe sixth therewith herewith smith forthwith wherewith silversmith monolith