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.
townish tonish tonnish donnish tannish danish tench
townish knish wennish tonnish finish vanish hennish hunnish mannish minish monish moonish nunnish punish danish donnish tannish tonish banish winish
townie town toonie townee towny atonia ton