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.
posies poesies poses poussies poises posses psis pussies possess puses pases pusses pauses peases peises passes pisses pieces pesos paces puces psoas pisos paisas paseos passus peaces piceous poaceous
busies hissies dassies sassies wussies hussies tassies cissies kneesies cosies lassies posies newsies pussies poesies missies gussies poussies easies bossies daisies sissies sis looses vases gnosis louses lasses facies gneisses hoises biases lyses fesses lases pauses basses vises quassias physis liaises vices hisses musses poises coseys messes phasis gasses peises ruses noses reissues asses roses resews noises pases diesis assize hoseys bices resees deices assais pisses cases dowses sasses misses maizes issues fosses puses tizzies wisses teases hoses ceases touses tusses uses doozies mosses whosis niseis wusses bises chaises chases disses chassis sices chesses choices choses sisses chowses muses gnoses mousses posses gases loesses seis cozies paseos possess oases voices coses sizes sees dosses susses basis lassoes phases poses losses seises cassias cuisses cusses fusses guises bouses meiosis rouses lassis cesses oses mouses esses fusees meioses douses dices masses josses leases busses bowses hawses mises rases nouses tasses souses causes loses raises peases miosis assess fices physes missis lezzies sews feases sues quasses guesses rises gausses sice eases bosses mioses biasses lazies nesses cassis size lessees bizes fasces gessoes oasis juices doses fuses reuses pusses rices resize buses kisses ices passes reassess baizes seas houses baases jesses lysis isseis psis nauseas phizes gooses seizes bases moseys noesis wizes tawses tissues tosses sises tussehs tussis dizzies whoosis nooses rooses causeys wises ghazies chaoses dioecies chasses wrasses chausses chiauses chooses saices chouses daises yesses
psi poesy pois poise poos pose posse posy poussie pows apos epos pops popsie popsy