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