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.
where were whore wherry ware wear wore wire weir whir weer whirr wooer weary whirry war wair wary waur wiry
here where ere her hire dere hoer were mere whore cheer heir cere share hero sheer shire shore pere hear quaere eyre eerie aerie peerie perea sere hare doughier faerie chare chore fere shear shier shoer shrew