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.
twaes twas towies twos twice tweeze
waes twaes was keyways yowes howes weewees pewees ewes owes newies knawes lweis lowes leeways woes byways wees ways waws noways peewees seaways towies awes sways twas shwas yowies