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.
signet skint squint cygnet skinned squinty skeined siganid sequined sickened scant sequinned squinnied scanty secant scanned seconde sequent
beignet magnet cygnet signet coigned gannet hognut jaconet magneto pignut taggant
signa signee segni segno skin skinny soigne soignee