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.
hereof horrify
hereof whereof ref reef reif roof brief grief prof proof rarefy reroof torrefy tref shereef shroff
here her hare hear heir hero herry hire hiree hoer