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.
hyper per peri pier pere peer pear peery perea perry peerie pereia par pro pur pair pyre puri pure prow proa pree purr prao prau pore poor parr pare para pour pyro
hyper per pear peer pere peri pier year
hype hyp hypo hope type typey yipe