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.
memory memoir member mammary mummery mimer maimer mammer mimbar mummer
memory mor tumour summery rumour remora mummery miry moor moory mora moray more amour ambry emery femora humor humour mammary memoir nummary rumor summary tumor shimmery