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.
depots deputes teapots deputies deputize dipodies tappets tippets
pots depots bowpots spots boughpots teapots repots spats tappets capotes potsy poppets sapotes cowpats pets puts bipods spits spouts moppets sippets whippets coopts updos poets sapotas pats puppets copouts apods opts pipits lappets tippets coapts pipets pouts septs pods pits wipeouts
depot depute deputy dipody adept