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.
marrows morrows morros mars marries marse maars murrs mares maras mairs murras myrrhs morose morris murres murreys murries mirs mors muras morse moors mures meres mores mires moras mbiras moires morass morays morassy
arrows barrows furrows sorrows farrows burrows yarrows marrows morrows narrows borrows harrows rows barrios churros cirrous trows ferrous drowse vrouws frows morros grows browse crows serows frowsy burros vrows prows brows drowsy cirrose charros karroos
marrow marrowy marry morro morrow mar