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.
whiteness whitens witness whatness wideness wittiness wetness witneys wheatens weediness widens witans woodiness woodenness
cuteness whiteness lateness muteness liteness butenes hotness cattiness dueness fitness tenues haughtiness fatness nuttiness nattiness matiness jettiness redness pettiness rudeness soddenness suddenness doughtiness tautness wetness neotenies goutiness witness woodenness battiness rootiness fattiness patness whatness tattiness sootiness retenes rottenness meetness leadenness quietness pottiness dottiness titaness mootness bittiness ruttiness mateyness meatiness knottiness hiddenness neatness ketenes nudeness wideness wittiness chattiness tens