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.
sloshy slosh slushy slouchy slash slush slouch slatch celosia salchow silesia
sloshy bolshy flashy fleshy galosh galoshe golosh goloshe plashy plushy slosh slushy
silo sloe slow solo loessal loessial loosely losel lousily