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.
dagos dagoes dags daggas dogs docs tags digs dugs daks decos degas docks tacos dawks decays decoys dekkos taigas degauss doggies dioicous doux doxy tegs togs tugs
sagos dagos gos ags makos peags vagus egos fags rugous rugosa raggs jaggs zygose kagus bigos lags gogos cacaos jags goys tacos wags chigoes shakos mags quags segos goos dagoes logos magus hags agas sagas rugose nags ragas rags bags zags guacos gags goas goes sags dags tags chegoes shags yags