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.
concise conioses conscious coniosis coynesses cansos gooeynesses kenosis kinases kineses kinesis quinces
concise incise anises bonacis fancies finises ionises lionises nancies nuncios penises tennises
conies cocaines cocainize cocains cockiness cognise cognize sconce