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.
able abele ably abollae aboil abelia abolla abulia aboulia
able babble roble pebble noble quibble nibble bauble bible bobble gobble bubble fable dibble suable double sable wabble rubble feeble foible cobble rabble nubble nobble kibble liable gabble coble gable viable cable hobble dabble seeable doable ruble table rouble wobble