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.
bewared bewearied beworried bowered byword
bewared wared ward lowered wayward leeward toward cowered sward coward seaward hayward reward vaward bewearied bowered award wired wearied warred waired powered rewired sewered dowered towered showered