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.
obese obes obeys oboes obeahs obas obis obias
obese bes rabbies beys hubbies gibes lobes jibes boobies abase rubbies gobies soubise lubes kebbies kibbes cabbies abbess kibes cubes bise ribose daubes yabbies tobies buboes tabbies dobies base diabase maybes rebbes subsea vibes newbies rubies abuse hobbies oboes abbes jubes bawbees babies kibeis obes kibbehs gabies cubbies hoboes subbase goboes rubes bobbies abbeys bees gibbose beebees lobbies gybes rabies baubees babes robes ribes pubes loobies obeys sabes bubbies nabes syboes hebes debase dobbies phoebes doobies tabes mabes tubes yobboes