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.
neaten neoteny newton niton
beaten wheaten neaten eaten laten paten oaten ten sateen rotten lutein fatten mitten ratan neoteny heighten ketene zeatin steno catena sitten poteen butene leaden patin ratten whiten tauten deaden kitten boughten batten baton matin potteen litten bitten retene patten ratteen latten teen quieten satin laden lateen gotten written stein shotten
neat net gnat gnatty knead natty nett netty newt anatto enate