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.
bubble babble bauble bobble bubale bubbly bible bubal babel babul babool
babble nibble dabble pebble bubble rabble quibble bobble rubble nubble wabble gobble cobble nobble kibble dibble gabble hobble wobble lobule sable nubile rubbly hubbly bale cable obole doable noble bubale habile bole knobbly rouble bible ruble suable able gable coble viable bauble blae table abele roble liable blew foible feeble labile fable nebule jubile bubbly pebbly nubbly mobile double seeable tubule blue wabbly bile wobbly
bubby bubba bub baubee bibb bobby boubou bubo bubu hubbub rubbaboo