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.
roshis rishis rachis rashes reshes rushes reshoes reshows rushees ratios rechose roaches rotches rouches rechoose reechoes
rishis roshis dashis sushis litchis whooshes pishes tushes zoysias dishes chias noshes pashas vichies fishes hashes meshes knishes washes choushes wooshes mashes mushes bushes geishas quashes rachis gushes reshes cashes chais boshes sashes hoochies techies chis pashes pushes duchies whishes shes toshes lichis deashes leashes pachisi joshes ashes bashes shies moshes mashies chichis tushies wishes coshes gashes lushes gnashes lashes rashes kashas fashes rushes nitchies cuishes hushes dashes shushes
roshi rash resh reshoe reshow rishi rush rushee rushy frosh