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.
amas amahs amass amias aims amis amus amaze ambos amies amiss ammos amuse awmous amice amici
mas gammas shamas doumas somas cymas pimas nomas mommas mamas loumas llamas limas lemmas lamas gummas gamas amas commas comas camas caeomas bimas bemas lumas mammas nemas pneumas pumas simas summas dumas shammas