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.
petit petite petted pedate pitied pitted podite potato putout puttied patootie
petit tit deity titi toit biotite edit fetid foetid vedette vidette jadeite coedit petite ratite reedit
pet peat peaty petti petto petty pieta piety poet ptui