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.
rumba rum rummy ram rem rim rom rami ream rime rimy roam room
rumba gumma dumbo duma summa jumbo pneuma numb mamba luma louma limba gumbo embay goombay goombah gambia gamba cumbia cambia puma samba douma dumb umbo