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.
degums degames degamis dogmas digammas digamous dicambas digamies
gums degums begums jugums sigmas agmas guaiacums ogams hokums magmas locums legumes koumis kumys vacuums gaums gams oakums scums zeugmas koumys guaiocums dogmas