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.
nosy nosey noisy nos nose nows noes nous naos noise noose knows newsy naysay nus nisi gnus nays ness news wyns gnaws knees nisei wynns
cosy goosy nosy posy rosy choosy os