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.
sheered cheered sheared shred sherd shrewd shared shored shirred shrewdie shard chared shroud shaird chored charred chaired sheroot churred chirred choired choreoid chard chord short chert shirt cherty shirty shorty cheroot choroid shortie tiaraed
jeered veered queered sheered leered peered cheered sheared heired tiered eared teared erred sered feared aeried jereed cered queried seared neared zeroed nereid teredo reared geared reread red
sheer cheer cheerio cheero cheery shear sherry shier shoer usher