Here's what rhymes with twofifth.
fifth Words that almost rhyme with twofifth
sieves scythes riffs skiffs sniffs whiffs stiffs gives lives myths cliffs smiths writhes clefs mastiffs withes forgives blacksmiths gunsmiths hieroglyphs monoliths goldsmiths silversmiths filth scythe myth sixth width pith smith writhed writhe plinth forthwith labyrinth therewith herewith hyacinth wherewith monolith silversmith