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.
fennec finnicky finca fanega feeing feuing finicky hyphenic
fennec neck wryneck seneca sneck tannic
fenny fen faena fanny finny funny