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.
cots cotes coots coats coitus cottas coatis cuts cods cats cooties coatees codas coeds kotos gouts goats codes cutes cates cutis quoits cutesy quotes cuteys kotows quotas cuties kowtows codeias cutties catties cutesie goatees guts kits cuds gods kats qats cads gats kytes gowds quods goads kudos keets caids goods gaits gates cades gutsy katas quits cadis kites
boots cots shoots tots dots soots roots pots oots knots mots moots lots loots coots bots jots hots hoots phots foots riots rots sots toots wots shots