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.
resays resaws reseaus recess reuses resees resows resews reassess reissues ruses roses rases razes races rises risus rices raises razees razzes resize rooses rouses hyraces reseize rosacea wrasses
assays resays bioassays missays essays naysays says nauseas mesas saws seas soys coseys paisas visas resaws seesaws quassias casas lyssas assais massas fossas masas sass hoseys psoas causeys misassay cassias moseys tussahs
resay resaw res ores tress dressy reraise rearouse prese grease rees resee reis reissue reseau cress ureas ursa crease resew resow rears press tressy tres creasy dress reuse roes ares urease ires presa areas greasy rues cressy ursae