I've taken a list of English words, and examined each of them to see what they sound like (using the PHP metaphone function). This page lists the most common metaphone codes, along with their words. You can also search for a word of your own, and see which words sound similar - and which ones rhyme, and which ones alliterate.
hostess hosts hoists hastes hostas hessites hests hists heists hayseeds
hostess sates tests testees zoisites posties pasties nasties mesteso lysates sites stews sties stoss bastes beasties vestees hastes hessites gestes castes coesites gustoes listees mestees mustees pastes pistes resites tastes testes wastes
host haste hoised hoist hosed hosta housed