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.
danish donnish tannish tonish tonnish townish dunch
knish monish wennish tonnish tannish danish finish vanish hunnish banish mannish hennish minish moonish nunnish punish donnish tonish townish winish gnash nosh mensh snash