Here's what rhymes with firith.
writhed writhe myth pith scythe therewith herewith smith forthwith wherewith monolith silversmith Words that almost rhyme with firith
riff rive his this with give fish wish miss viz bis dish kiss bliss cliff dis sieve def diss hiss sis pis piss whiff biz hes kith whiz fizz shes tiff forgive stiff abyss amiss quiz sniff outlive relive remiss skiff swish premiss hieroglyph midriff dismiss chandeliers jellyfish reminisce cuttlefish corroborative fifth width filth plinth sixth hyacinth labyrinth