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.
flus flues fils folious fleas false foals fails fells fowls fills floss flows files fulls flees fouls flaws feels foils filos flies falls fuels fools flews fleys floes flays fillos fellas filose folles flossy values villus foleys folios floosy filles follis falsie flossie fellies foliose follows fillies floosie felloes follies feeless phallus fellahs fallows villous failles fellows vials viols vills vails veils veals valse vales voles
bolus flus phallus villus hilus callus gallus lulus pilus plus poilus solus sulus talus tolus ulus