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.
goulashes goloshes clashes gulches calashes galoshes culches cultches glitches klatches guilloches cliches cloches caleches caliches clutches
flashes lashes plashes goulashes calashes clashes slashes blushes slushes goloshes leashes relishes plushes laches lushes flushes galoshes polishes bolshies sloshes fleshes welshes