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.
leaser laser lesser lassoer lacer loser lacier lazier lessor looser leisure lousier lazar
baser raser maser teaser chaser leaser laser ser cusser goosier easier sear looser gazer hoser facer quasar mosser masseur miser houser sere rosery mossier razer dowser gasser poiser issuer raiser messier diseur choosier cheesier newsier wowser user tosser loser douser dosser seiser pisser riser rouser mazer poser geyser busier mouser macer hissier noisier suer hazer pauser lousier lacer mousier sera lesser wiser bossier passer pacer pussier muser nosier lassoer causer hosier dossier seer hawser guesser osier wussier massier nooser queasier poseur hisser doser mussier fusser gassier misery racer kaiser reissuer fussier cosier rooser rosier sassier sissier kisser tessera tusser chasseur chooser chouser
lease leas las les sleazo please leis oles loess glassie lees classy leys fleas lessee blase less alas laws lays glass lasso ales lassie bless lassi class lass lues lase glassy lies pleas sleaze sleazy