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.
subsea subs soubise subbase subas subahs subbass sabs sibs sobs sabes sibbs sobas syboes
subsea base bise abase abuse gibbose obese ribose soubise subbase debase diabase