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.
sheerer cheerer shearer cheerier sharer charier
queerer cheerer sheerer jeerer cheerier fuehrer shearer rearer verier nearer merer leerier querier hearer tearer serer fierier aerier beerier bearer searer dearer wearer fearer eerier
sheer cheer cheerio cheero cheery shear sherry shier shoer usher