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.
spale spail spall spile sepal supple speel speil spiel spell spill spoil spool splay supply sappily soapily zeppole
spale pale pal topple diploe duple spile zeppole pele pial apple keypal plie pole pule tepal uppile pile hopple plew maypole nopal papal people popple repeal sepal couple appall cupule fipple maple appeal pawl spail copal paly pall palea pail appal peal opal plea nipple papule pipal pupal ripple spall supple dapple dipole tapalo tipple typal wheeple