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.
readds redds reads reds rads readies raids reeds roads rudds redos redes redoes reatas radios radius redias roadies roadeos rids rods rets rats roods rotas rites rodes ratos rides rates rotes rottes raitas routes reduce rodeos riatas retuse reties writes rowdies
readds adds ads mauds gadis raids kadis hades gauds lads bads ados cadis beads caids mads aids kneads dadas leads sades shads naiades odds pads reads roads bauds chads saids dads duads tads wades wads bawds quads qadis sadis jades kiddos lades fados redds fades rudds cads dados sudds duds deads wadis toads caddis shades maids cades goads rads padis naiads nadas meads loads woads heads lauds qaids gads gaddis fads yauds
read ready readd red rad radio rued oread great grad roadeo credo grade ired roadie orad brad reedy dread trade treat uredia redo reed rede raid reata radii redd create redia irade cred bready brede bread rediae bred road reared trad tread treaty uredo