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.
nebule nebulae nebula nebuly noble nibble nobble nubble nubile nobly nubbly knobbly nobbily
lobule nebule tubule mobile labile cobble bubale fable bauble babul bible able nebulae gobble abele foible gabble quibble buhl wabble viable habile nebuly nobble nubble obole rabble rouble liable sable suable dibble double table tabuli ruble jubile gable blew fibulae kibble boulle bole blue bobble bale blae feeble bubble boule cable bull hobble nibble bile dabble babble coble nebula tabouleh tabbouleh doable seeable fibula ciboule rubble roble pebble nubile noble wobble