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.
locums legumes leucomas leukomas leukemias leukaemias
guaiacums guaiocums locums scums koumis degums oakums cams cwms gaums gums hokums begums kumys jugums legumes acmes scams koumys vacuums chacmas