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.
conniver connivery conifer confer coinfer conferee conferree
conniver miniver knifer naiver never envier conifer connivery runover whenever