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.
sabre saber sabir sabra subarea sober suber subbureau sobber
sabre abri taber byre sabir rebore librae labra labor kabar caber fibre bare barre brie brew bree brae bore saber sabra subarea tabor