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.
flossy floss floosy flossie flows filos floes fillos folios floozy filose felloes folious fellows feeless floosie follows foliose fallows flus fils flaws foils flues foals fails fowls flees fulls fells flays fools flies false fuels files fouls fleys feels flews fleas fills falls falsie folles foleys filles follis fellas fleecy failles fallacy fellahs fellies fillies floozie follies phyllos villose villous vowless viewless
flossy lossy glossy loess loss lousy blousy blowsy floosy floss jealousy classy colossi glassy gloss glossa