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.
simious sims simas semis sumos cymous sambos samosa sums soms seams seems semes smews somas sambas summas zamias
nimious simious timeous mousy cymous miaous moues mouse meous awmous comous gummous momus ramous rimous daimios famous chymous mis mos mus