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.
wary weary war wear wiry waur ware wair worry wherry whirry were weir wire whir wore weer where whirr whore wirra wooer
vary hoary leary nary deary diary teary wary weary chary ar