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.
nowts newts notes knots knouts nods nuts nits nets gnats neats nites knits nates nodus nodes netts nutsy nodose nodous notice noddies
nowts lotas louts outs wets boots goats coats dots roots knouts tows kotows boats quoits rotes gowds moats motts bots cotes pouts notes motes chotts shotts shoats wits touts toots doits pots hots dows jotas shotes totes dawts biotas rotos quotes routs lots sots oats botas loots kotos coots bouts mots meadows gouts rotas kowtows photos votes newts knots riots dotes jots cots footsy wats oots lotus potsy moots foots shoots dowse soots lotos rots quotas rotis phots stows tootsy iotas wots botts hoots poets doats toits tots widows shadows shots shouts
nowt not knot knotty newt nota note snot snotty