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.
bolshies blushes belches bleaches blotches
bolshies clashes slushes slashes polishes plushes plashes goulashes goloshes galoshes calashes lashes flushes fleshes flashes blushes lushes leashes relishes sloshes welshes