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.
enter entera ender entry endear entire entree endure enduro
banter minter shunter taunter saunter hinter counter vaunter pointer enter reinter haunter tinter jointer canter reenter hunter chanter chaunter punter renter tenter chunter ranter winter center painter linter mounter cointer inter gaunter quainter venter fainter wanter sinter bunter daunter lender jauntier ender hinder pinder bonder niter netter fonder quintar kantar santero montero vender gnattier cinder nettier noter snootier bender founder neater cantor reuniter rentier sonneteer tentier gauntry nitery yantra chantry santir wintry santera intro uniter tender nittier daintier contra sounder snoutier launder knottier entera rounder lander sunder paintier bander snottier gantry entry zander binder nattier natter sonder reentry pander country pointier centre lientery nutter mender meander minder knotter mintier sender under sander gentry ponder pantry render finder minuter fender bounder santur antre neuter centra nuttier daunder hounder lintier tantra gender funder runtier mentor sentry antra joinder kinder pounder knitter qintar mantra maunder hander tinder wander winder wintery wonder chantor keynoter dander gander yonder