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.
moon moony mon mony muon mono mown moan monie money mun man men myna muni maun mien mine hymn main mana meno mina menu mean mano mini mawn many mane hymen mania manna meany meiny minae minny mynah
boon coon goon loon moon noon poon soon zoon toon shoon on