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.
cuirasses curses crases curassows crosses cruises grasses cresses courses creases caresses curacies crises corses cruses carassows crazes carses crasis greases creeses crazies grosses karosses carouses graces crisis gorses cruces crozes grazes krises carices coerces coryzas grouses kerseys griseous
wrasses frasses harasses cuirasses grasses trasses brasses morasses rases brassies boreases terrases caresses arrases crosses phrases fraises greases braises raises heiresses cresses hydrases trusses ureases prisses charases grosses drosses presses dresses praises gyrases duresses reraises seeresses erases peeresses crases brisses reassess karosses prosses prases tresses urases whereases creases chorusses