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.
emmys ems embays emes emus emeus emboss embows embassy
emmys commas shammos shammas summas mumms mommas mammeys mameys lemmas kumys koumyss koumys gummas gammas gamays gimmes mays hummus hommos homeys femmes ammos limeys mammas mems moms mums wammus shammes shamoys