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.
musics musicks mosaics muskies musks misguess mousakas masks mosks moussakas masques miscues mosques
basics sics physics musics secs discs sicks ciscos skis fiascos musicks sacs cuscus ascus cosecs cusecs mosaics fossicks piscos fiscs discos viscus discus
musick music mesic mousaka moussaka musca muscae musk muskie musky