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.
signiori signior signori seignior signiory signor seigniory signora signore signory seignory signer seigneur skinnier seigneury squinnier skinner sickener
signiori seignior seigniory signior signiory signori
segni signa signee soigne soignee