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.
fleche fleech fletch filch flesh fleshy flitch flash flush flashy fluish foolish
caleche fleche pleach cloche cliche caliche fletch fleech bleach belch lychee louche lichee letch leech lech leach guilloche welch
file flea flee flew fley floe flue foley