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.
flesh fleshy flash flush flashy fleche fleech fletch fluish foolish filch flitch ghoulish
flesh lash slush slash polish plash owlish galosh clash goulash leash lech lush blueish blush tallish dollish bolshy bullish calash slosh relish plush palish mulish coolish golosh flash hellish ghoulish foolish flush fleshy dullish delish welsh
file flea flee flew fley floe flue foley