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.
newts nets nowts netts neats nuts nits knits nites nodes needs knots nides gnats nates notes nudes nutsy kneads knouts nudies naiades neddies noddies nods
newts dews netts pets meats metes leets cetes poets sets jets quiets hets zetas stews deets gets beats duets bedews tets haets weets betas wheats bets wits beets cheats neats yetis nowts tews feats getas nets peats lets meets quietus rets pietas seats jetes keets heats suets setts dawts foetus etas diets fetus teats vets wats fetes wets fetas whets fets wots metis sheets eats yetts