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.
fleshy flesh flashy flash flush fleche fleech fletch fluish foolish filch flitch ghoulish
fleshy leash blueish bolshy flashy flesh plashy plushy sloshy slushy welsh
file flea flee flew fley floe flue foley