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.
snash snatch sneesh snatchy snowshoe synch sennachie snitch
gnash snash wennish tonnish tannish danish knish nosh banish finish vanish hennish hunnish mannish mensh minish monish moonish nunnish punish donnish tonish townish winish