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.
uniter unitary under undoer untrue undraw undrew
niter uniter reuniter minaudiere entera nutter needier fainter cointer quainter banter nitery handier chanter monitor wanter nitro netter renter gaunter bunter center mounter linter inter chunter winter mintier snottier tinter tenter saunter dinitro dandier nittier sonneteer nitre vaunter randier reenter paintier santera neuter pointier neater nettier snider hinter ranter snootier keynoter venter genitor lientery tentier hunter runtier enter minuter punter canter nuttier reinter gnattier counter knitter jointer lintier bendier jauntier nattier haunter knottier knotter pointer sandier natter taunter noter janitor sinter rentier daintier painter daunter santero minter montero windier wintery snoutier chaunter shunter