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.
pipets pipettes pipits poppets puppets paupiettes pupates peptize
pets tappets lappets poppets pipets whippets puppets sippets moppets tippets pots peats septs poets pits cowpats pats coapts repeats coopts spits spots pipits spats opts bowpots bipeds peds pietas repots boughpots mopeds depots teapots puts nepetas
piped pipet pipette pipit pipped