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.
betray bettor beater better buttery battery bootery bider biter beader butter bawdry bedder bidder badder batter bitter boater budder baiter battier bawdier beadier bittier batterie
betray tray stray try straw story strawy cautery tory tora yttria jittery deray dray latria lottery nutria pottery stria sutra datura tetra tuatara watery nitery rotary trey eatery battery guttery bootery littery buttery mattery votary poetry atria satara notary retry cattery troy stroy datary dietary tottery tuatera chattery