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.
shear share shoer sheer shier sharia sherry shri shariah char shore chare shire shrew chary charr chair shirr cheer charro charry cheero cheery cherry chorea cheerio
hear shear ear her share chary pear haar feuar fear leary heir hair dear doughier teary weary chair chare sheer shoer bear sear tear hero charr char near where here wear gear lear deary cheer hoer deair hoar rear hare shier year
shea sha she shah shaugh shaw shay sheugh shew shoe pshaw sheesh sheuch