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.
gender gentry genitor joinder geniture jointer gyniatry jauntier
bender sonder ponder tinder sounder maunder kinder meander pander sender bounder pounder gander under wander ender vender joinder daunder pinder dander bander hounder bonder yonder lander sunder fonder tender binder sander hinder cinder gender finder funder mender hander render lender minder founder zander launder rounder wonder winder fender reinter taunter daunter denuder indri cointer banter venter pointer center saunter fainter endear qindar enter wanter cindery jointer shunter tindery dandier tundra reindeer andro vaunter nodder windier needier undoer hinter chaunter nuder haunter quainter foundry counter sandier sinter bindery ranter kneader punter reenter mounter sundry linter randier tenter painter bendier gaunter tinter minter candor hunter chanter canter winter vendor bunter handier snider laundry condor renter chunter inter needer
genet genette gent gentoo agenda agent