Here's what rhymes with polyfilament.
filament Words that almost rhyme with polyfilament
ligament militant silicate vigilant visitant sycophant virulent ficklest difficult legitimate participant predicament simulate stimulant militarist precipitant littlest medicament nimblest equivalent ambivalent coincident omnipotent belittlement ministrant cheerfullest nonmilitant magnificent imprisonment grandiloquent dissimulate nonvirulent timpanist particulate abolitionist empiricist individuate gesticulate nonequivalent nonparticipant inarticulate exhibitionist prohibitionist coalitionist indiscriminate