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.
searest serest sorest surest sourest serosity sorriest
nearest searest barest yarest dearest rarest rest charriest tarriest merest sheerest crest drest truest forest merriest arrest leariest eeriest fairest direst weariest wiriest fieriest aeriest burriest rearrest serest sorriest surest diarist dourest driest teariest wariest chariest airiest preset presto goriest beeriest karst airest prest furriest resat freest firriest miriest breast resit veriest wrest priest mooriest poorest queerest sorest sourest wriest purest leeriest hairiest hoariest reest reset cheeriest
sarees sears seeress seres series