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.
codeias codas codes cods coats cotes cades coeds cadis coatis caddis cottas coitus caddies coatees cooties cuddies goodies goddess caducei cuds cats cads gods cots gowds goads caids cates gudes quods cutis coots qadis gadis cutes kadis goods goats gaddis cuteys quotas quoits guides cutesy cuties quotes goatees kiddoes keddahs catties gaudies gateaus kiddies cutesie koodoos cutties caddice
codeias ideas medias redias deads ditas dis