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.
musick music musk musca mesic musky mosaic muscae muskie mousaka mask mosk moussaka
fossick seasick musick sick sic phasic tussuck vesica towsack sock kneesock cossack suck sack sicko mesic caseic sika physic music hassock mosaic gneissic basic cassock tussock sike waesuck
mus mouse mousey mousse mousy muse muss mussy amus amuse emus mums