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.
clupeid clupeoid cleped clopped ycleped clipped clapped kelped gulped glopped coalpit galoped clypeate galloped clapt clept clipt yclept gluepot
clupeid louped clupeoid gulped pulped