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.
charases choruses chorusses sherrises chorizos
arrases charases gyrases urases prases terrases crases rases hydrases phrases erases irises parises corses boreases brises roses courses boraces crasis merises erses cuirasses bourses grasses frises arses brazes horses broses crazes graces worses parses braces xeruses choruses uruses wrasses traces ruses proses braises diureses diaereses soroses pareses ceruses pursues rerises creases peruses fraises races praises frasses carses phereses hearses grazes gorses birses rises verses greases razes arrises viroses morrises crises lorises krises kerseys perses burses arises trasses brasses nurses curses hybrises terraces eroses torses varuses purses druses harasses marses cruses raises neuroses viruses prises jerseys morasses reraises orrises cerises saroses xeroses derrises diereses pharoses ureases whereases hyraces sherrises
charas chairs chares charros charrs chars