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.
signal signally seconal
regnal signal canal cuneal agnail agonal lacunal lagoonal oogonial seconal decanal diaconal diagonal shogunal
signa signee segni segno skin skinny soigne soignee