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.
undid undead untidy unadded unaided unideaed unneeded united untied unnoted uintaite
candid undid bandied pandit mounded landed mended banded candida bounded bended poinded bonded scended rounded sounded rended bandaid fended winded bandit pended hounded funded pounded ended pandied minded candied mantid handed tended vended ponded founded fonded sanded rinded sended pundit wended wounded
unde undee undo undue undy unit unite unity untie