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