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.
rushees rushes reshes rashes ruches rouches reshoes riches rishis roshis roaches ratches retches reaches rotches reshows rechews reechoes wretches rechose
rushees shes gashes mashies cashews vouchees fishes hashes bushes bouchees boshes fashes reshoes gnashes lychees cuishes lichees pishes lashes rashes gushes rushes dashes dishes toshes tushies whishes wishes choushes noshes joshes moshes pashes meshes coshes cheesy sheas hushes shies shoes mushes shews cashes knishes cheese mashes lushes pushes leashes reshes quashes ashes bashes sashes deashes toeshoes tushes washes whooshes wooshes shushes
rushee rush ruche rushy brush brushy crush grushie