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.
paisas psoas pisos pases pizzas paseos poises passus pauses peises pisses passes piazzas psis paces poses puses pesos pazazz peaces peases pieces posies posses pusses piceous poesies possess pussies poaceous poussies
visas paisas says saws sass cassias quassias lyssas seas massas mises naysays missays sissy nisus peises poises raises resays risus seises daises wises noises cissy nauseas mesas bioassays bises essays fossas vises hoises baizas casas guises masas liaises misos assays pisos psoas resaws rises seesaws sises tussahs chaises
paisa paise pis pas paseo spas pass paps passe pois passee piso pase pies pays pias pause peas piss paws poise pease pips peise upas