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.
been ben bean bene beano benne benni benny beanie ban bin bun biennia bane bani bine bone bony boon buna bunn boney bonne bonny bunny
been keen queen peen seen teen ween wheen sheen en