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.
writs writes rites riots raitas riatas ritz ruts rats rids rots rets riotous raids rates ritzy rotas rotis rotos roots routs ratos rotes rides reties retuse rottes redias routes radios radius reatas readies roadies rowdies rads reds rods
writs its bitsy mites quits litas baits bites bits kits mitts bitts aits riots rets ritz pitas ruts boites fiats sites situs suits zits ditas dits doits titis toits whites wites chits raitas gits mitis rites nites gites lits quiets quoits gaits coitus fits kites writes hits knits rids rats pits rots nits cites sits suites zitis diets dites ditsy duits tits waits whits wits shits
write writ wert wart raita riata riot rite wried wrote brit britt frit fritt crit grit gritty trite warty wort