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.
assess asses assais assays assize aces
assess possess reassess hoseys niseis loses kneesies hoses paseos easies lassies gneisses buses kisses mesas pesos fuses bouses poses lases lessees posses esses moseys hissies uses chouses dieses isseis ruses vases fosses houses raises cosies poesies causes coses chesses tosses susses mioses josses bases bosses busses biasses feases tassies masses yeses chooses gasses baases gooses pusses poussies loesses sissies teases biases chausses resews oases noises nesses roses sassies daisies dowses tussehs chaises wises passes sises wusses asses phases mouses reissues leases ceases rises muses disses chases cusses louses cissies guises beses peases dosses basses misses noses hawses leses coseys gussies hussies hisses cases musses nauseas cess bises issues sues messes fusees pisses seis eses bossies bowses mises sees gausses rouses cuisses gessoes looses seas gases vises poises posies physes fusses meioses fasces nouses noesis busies lassoes fesses sass guesses causeys hoises suss resees jesses liaises peises puses seises rases gnoses douses tasses mosses quasses missies recess lyses tawses lasses sisses reuses sews eases mousses sasses wrasses nooses pases souses losses newsies wisses pauses rooses pussies tissues doses daises cesses tusses diesis wiseass touses wussies oses chaoses chasses cheeses chiauses dassies choses chowses yesses