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.
cheroot sheroot chert cherty chariot chart choroid cheered charity chorioid choreoid chard chord sherd shirt short chored chared shirty shorty shroud chaired charade charred chirred choired churred sheared sheered
sheroot cheroot root rooty heriot pierrot rot
cheer cheerio cheero cheery cherry chiro ocher ochery