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.
sandier sander sender santir zander sunder sonder snider santera sounder saunter santero snoutier snootier santeria sanitary snottier sanitaria sanitoria cinder santur sinter sundry santour cindery santoor sanatoria sonneteer center sentry senator
bendier windier randier handier sandier dandier minder reindeer maunder dander bender fender joinder vender kinder lender bindery nuder niter founder needier bander tender ender jauntier wonder winder uniter hounder lander ponder endear gender nadir binder render runtier cindery daunder reuniter paintier pinder sander mender cinder bonder sounder sonder rentier bounder gander sunder funder hander daintier zander rounder fonder launder under tinder finder hinder lintier meander minaudiere mintier pander pointier pounder wander snider denuder tentier tindery undoer sender yonder