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.
lesser leaser lessor lassoer laser loser looser leisure lousier lacer lacier lazier
fusser passer gasser pisser cusser kisser hisser tosser mosser dosser tusser lesser guesser ser sere geyser poiser sassier raser suer lassoer messier noisier raiser pauser lessor poseur busier houser causer looser mousier nosier tussar issuer dossier choosier cheesier chaser wowser user tussor tessera dowser sissier queasier doser nooser seiser hussar goosier mossier lousier cosier baser diseur sear massier rouser rooser newsier bossier easier laser rosery miser misery poser riser gassier hissier scissor kaiser loser hoser pussier seer mussier douser mouser rosier maser leaser osier muser hawser reissuer teaser hosier sera fussier masseur tussur wiser wussier chasseur chooser chouser
lessee less les lies bless leys lyssa leis lossy loss loess lease lees leas lasso lassie lassi lass lues ales oles