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