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.
fire fir feirie fore fair fere free fiar fare frae froe fiery vireo fairy firry faerie feriae fry fro far fur for fer frow vier fury fear fray four vair faro fora faery feria ferry feuar foray furry
fire hire ire quire lire mire moire cire sire zaire dire tire wire shire re