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.
nisi nisei noisy noise newsie gneiss nus nos nous nows nazi nose naos nosy noes nays ness news nice gnus wyns gnaws knees knows newsy niece noose nosey wynns