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.
mome mom momi mime mimeo mommy mamey mamie momma mammie mammae mammee mammey mem mum mim meme memo maim mama mumm mumu mamba mambo mamma mammy mummy
biome home come mome gnome nome pome some dome tome me om
mom mome momi momma mommy mm mo om