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.
fro froe faro frow fry furrow fir farrow fur far fer for furrowy fare fear fere fora fair four fire fiar frae free vrow fore fury fray vrouw firry faery fairy feria ferry furry fiery feuar vireo foray faerie feirie feriae forwhy gherao