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