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.
slosh sloshy slash slush slouch slushy slouchy slatch celosia salchow silesia
galosh golosh slosh galoshe dollish slush palish flush mulish goulash relish tallish lash lush blush bolshy bullish flash loch ghoulish flesh moloch delish sloshy plush foolish slash plash polish hellish goloshe coolish clash calash owlish dullish welsh
silo sloe slow solo loessal loessial loosely losel lousily