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.
shoer shore shier shear sheer sherry shri cheer choir chore share shirr shrew shire chorea sharia cheero cheery cherry cheerio shariah char
hoer shoer her hour cheer whore hear heir here hero hoar hora chore cooer goer zooier doer doughier where wooer choir shear shier gooier sheer shore
shoe she shea sheugh shew shoo show showy sheesh sheuch