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.
serenate serenade serenata serenity serranid serranoid
crenate serenate ternate rente ruinate arenite herniate carinate coronate grenade craniate marinate ornate perennate pronate serenade serenata urinate
serene serein serin serine siren syren