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.
rupees rappees roups ropes ripes rapes rupiahs reps rips raps reaps repos repps wraps repass repays repose ripsaw reoppose repousse
pees topees teepees rappees epees toupees tepees rupees whoopees veepees pes kewpies hoopoes spews neeps hopes spaes guppies taupes dopes sipes capes pappies pipes copies cepes rapes mopes spues hypes popes yippies shoppes chippies cheapies chapes whoopies supes ropes peso spies puppies keeps tapes jeeps coupes seeps wheeps peeps napes hippies opes weepies cowpeas beeps loupes pies japes veeps pews ripes copes buppies jupes dupes peas deeps topes lopes tawpies peps cowpies koppies apes gapes poppies pehs weeps nappies types nappes wipes chappies cheeps shapes yipes yuppies
rupee rape ripe rope ropey roup roupy rupiah drupe