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.
wigan wagon waken waggon weaken weakon
ligan wigan gan soigne gaun tigon signa pagan logan coign gaen gain gane guan regain began beigne bogan vegan hogan coigne lagan nagana again
wig whig wiggy swig twig twiggy