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.
rubes rubies rubs rubbies rubus ribes robes rabies rebbes rubace rubasse robs rabbies rubious rebs ribs rebus rabbis rebuys ribose
cubes lubes pubes rubes jubes tubes daubes bes vibes cubbies lobbies tubas bees bawbees phoebes jubas kibbes bubus rabies gabies obese kibbehs tabes obeys hebes hobbies fubsy kibes beys yabbies tubs dubs dobies daubs syboes subas ribes hubbies gobies fubs abbes obes newbies maybes baubees beebees abbess cubs loobies oboes kebbies lobes babies rabbies bubs abbeys rubies nabes kibeis goboes hubs gibes pubs bubbies buboes rubus mabes babes rubbies rebbes pubis cabbies boobies gybes bobbies robes sabes nubs hoboes subs dobbies doobies tabbies tobies rubs jibes chubs yobboes
rube rub robe rubby ruby grub grubby krubi drub