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.
courses corses curses carouses crases carses crises gorses cruses cuirasses cresses crosses grouses coerces creases creeses cruises curacies caresses curassows crisis crozes cruces krises crasis crazes greases carices coryzas crazies grosses kerseys grasses gracious karosses coriaceous graces grazes grosze
bourses burses courses nurses curses purses lorises corses cruises cereuses hearses crases rases viruses gorses orrises rearouses arrases cerises erses prases crises carses proses arouses neuroses krises xeruses chorusses charases uruses uraeuses torses hydrases diureses diaereses sources erases rerises saroses arises furzes pursues bursas jerseys parises arrises brises merises rises pareses phereses phrases carouses prises ruses birses morrises roses varuses peruses kerseys bruises cruses horses rouses marses viroses pharoses irises hybrises perses broses arses parses eroses frises grouses verses gyrases ceruses reuses xeroses soroses derrises diereses druses terrases trusses urases worses choruses sherrises
course cors curs coarse coirs cores corse crouse curassow cures currs curse scours