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.
grosses crosses grasses grouses karosses gorses grosze cresses greases grosz caresses carouses griseous cuirasses grazes crises curses graces cruses groszy crases carses krises corses crozes kerseys courses creeses cruises creases grazioso gracious gracioso curassows carassows crasis crazes crisis cruces carices coerces crazies grecize
crosses drosses prosses grosses karosses reassess presses pharoses neuroses caresses brasses heiresses roses prissies cresses brisses arouses broses xeroses brassies reissues eroses browses wrasses duresses trasses trioses worses grouses proses carouses peeresses dresses soroses prossies frasses rooses morasses corses rouses cuirasses seeresses saroses viroses rearouses gorses horses harasses grasses prisses drowses torses tresses trusses chorusses
gross cross crosse grass grassy grouse grows