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.
whigs wigs wags wogs wicks whacks whackos woks
whigs bigs shags chics iggs digs saigas rigs biogs figs vigas vigs hags hogs hugs bigos gigas gigs jigs miggs migs pigs cigs zigs taigas wigs chugs shogs
whig wig wiggy swig twig twiggy