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.
wrens reins renews rouens runs wryness rins rennase rains ranis ruins runes rinse roans ranees ruanas rawness ruinous
wrens ens scenas peens penes beans leans lenis eons faenas denes neons teens queans mense lens paeons liens genus miens means zeins weans yeans hyaenas reins whens wheens benes weensy jeans sensa tens rouens kenos dense fens pens foehns aeons gens paeans veenas lense hyphens lenos nenes menus peins teensy mensa dens veins lenes bens hens peans queens runs scenes hymens venus deans sense cense kens genes dienes peons keens tense penis weens wens rins whenas sheens hygienes hyenas yens
wren rein renew arena arene bren erenow frena warn worn