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.
crases creases crises crazes curses crasis carses cruses corses cuirasses courses creeses grasses crazies crosses cresses cruises greases curacies carouses caresses gorses crisis carassows grazes crozes graces krises cruces curassows coryzas carices kerseys coerces grouses grosses karosses griseous coriaceous grosze gracioso gracious graecize grazioso
rases terrases charases crases greases hydrases arrases urases boreases prases creases whereases gyrases erases phrases ureases rooses carses broses arses grazes hearses frises viruses foresees heiresses rouses orrises graces horses heresies courses uraeuses arises peruses rises brises duresses prissies parises curses brassies rearouses cruises peeresses brazes braces parses marses roses drowses cerises saroses soroses xeroses derrises purses dresses diereses terraces torses trasses trioses wrasses chorusses ruses morasses grosses rerises pharoses crosses pharisees krises bourses creeses grasses browses hybrises races varuses prosses nurses prises hyraces cuirasses irises verses birses karosses prisses burses viroses caresses jerseys neuroses cereuses fraises razes prossies resews grouses gorses reraises reissues resees raises cresses arrises boraces eroses phoresies reuses bruises braises frisees frasses crises arouses proses perses cruses crazes phereses reassess morrises kerseys lorises erses uruses crasis praises presses brisses pursues merises pareses harasses worses drosses choruses trusses tresses traces carouses corses druses diureses brasses diaereses xeruses surcease seeresses ceruses sherrises
crass crease grass curs curacy crus cross crissa cris cressy cress creasy crazy carassow craze craws corse cors carse cars crosse cruse curassow curse grassy