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.
conatus contuse contos counts cantus contes connotes cants countess cunts coonties counties condos gonads qanats conoids conduce condoes canities contessa quinnats canids cantos kentes quants quints candies gannets gunites kainits quintas quintes
conatus phenates tannates sonatas ruinates penates mantuas nates neats annates enates hyphenates gnats cantus phonates contuse qanats quinnats landaus manats manitus neonates pinatas senates donates tinnitus
connate conte conto coontie count county cognate