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