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.
libra librae labra liber libri labara libber labor lobar labour lobber lubber lowbrow
libra bra zebra libri bora brae braw bray bura fiber fibre giber jiber cobra labara labra liber librae sabra dobra