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.
samech samshu smooch smutch sumach smoochy smutchy smash smush smoosh
samech mach mesh much immesh kimchi sumach
same samba sambo seam seamy seme smew some