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.
lowrider larder lardier
rider derider joyrider lowrider arider horrider torrider gridder tireder quartier larder boarder ridder herder corder weirder guarder warder artier braider nerdier parader purtier rewriter dirtier tartier cruder tardier broider writer shirtier trader chertier border reorder broidery triter raider hardier curdier corridor heartier forrader murder cowriter wartier wordier lardier partier order hoarder carder harder ruder birder grader girder courtier yarder