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.
rewire rewore rewear rawer rower
wire haywire rewire cowier chewier viewier teaware beware swore aware seaware rewore wiry wore whir were weir ware wair sware dewier twier showier