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.
lassoes lassos lasses lassies lases losses leases lassis liaises lessees loses laces lyses lazes lazies looses louses laicise loesses leses luces lusus lysis lezzes lycees lyssas laicize lezzies
gessoes lassoes jesses koussos cussos lassos gausses gussies lasses quasses passes lassies sasses poussies gneissose hussies hissies issues fesses hisses posses fosses musses chesses dosses chasses wusses masses tusses tosses tassies loesses sissies mosses pussies reissues misses cesses sises dassies fusses cuisses bossies isseis guesses gasses cusses asses nesses pusses sassies bassos pisses biasses bosses esses josses lessees kussos busses kisses assess basses possess losses disses sisses cissies missies wrasses reassess mousses susses tissues gneisses tussehs wisses messes wussies chausses tasses yesses sos
lasso lass lassi lassie class classy glass glassie glassy las