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.
cormous corymbous corms corymbose grumous corymbs cramoisy crams gorms cramoisie caroms cremes kormas creams crimes crumbs curiums carroms crambes grumose quorums crummies grams gramas grimes grumes karmas kermis grooms kermes crambos grammas grammes kermess kirmess
cormous grumous chromous dormouse reremouse rearmouse promos primus primos paramos corymbous ramous brumous bromos biramous rimous ramus chromos shrewmouse