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.
scoped scooped scaped skipped skippet
cooped scoped scooped coped couped copped scaped recouped recapped lycopod caped capped copied cupped gapped kneecapped gawped kepped kipped quipped becapped equipped gaped reequipped recopied skipped