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.
phenyl phenol phonal phonily venal vinyl fennel veinal venial venule veinule venally venially
phenyl enol phenol venal vinyl keenly queenly lienal hymenal nonyl penal renal
phon phone phoney phono phony sphene