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