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.
liquation ligation legation location locution lection
liquation equation suction rogation reaction negation locution location ligation legation coaction vocation vacation faction auction action kation caution cation paction recaution ruction taction