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.
weeds weds weets wads wets wites whids whets woods wadis wades woads wides wheats woodsy wadies widows whites waddies whiteys whities whydahs widdies woodies whidahs wats wits wots
heeds weeds feeds seeds meeds deeds needs reeds eds cetes meads aedes geds suedes suttees coeds fetes reds redes leets zeds keets metes jetes meets reads kneads edhs deads tutees beads sheds cedis pedes puttees redds meds dees peds goatees cedes feuds leads bootees beets deets beds feds leuds heads settees redos coatees tees feods teds weets weds sheets
weed weedy wed weet awed owed swede sweet sweetie tweed tweedy tweet weeweed