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.
ninety nonet neonate noonday
ninety net genet janty jaunty canty gannet linnet vaunty lunet minuet nonet minty panty pointy punty runty sennet dainty tenty chantey shantey bounty vanity bennet bonnet banty neat bannet aunty newt netty linty nett jennet lenity county painty pineta punnet rennet sanity sonnet tenet unity chanty shanty
nine ninny none linen lineny ninon pinene