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.
popish peepshow
pish apish foppish hippish quippish mopish popish uppish cheapish sheepish pash poisha posh push hippieish yuppieish
pop poop pope poppa poppy epopee epopoeia