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.
ambler
bumbler humbler rumbler rambler ambler nimbler tumbler jumbler gambler fumbler mumbler cymbaleer mewler smaller smellier tummler sommelier mailer timelier seemlier mauler muller smeller comelier millier cymbaler moiler miller temblor miler mealier homelier smiler cameleer wamblier