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.
newsies kneesies nesses noesis gneisses noses nooses noises nieces gnosis gnoses nouses gneissose nisus niseis nauseas naysays
newsies bossies wussies wises tassies dassies sizes sises sassies pussies posies poesies kneesies missies lassies gussies cosies sices wizes tawses dowses daisies sissies cissies hussies poussies bowses busies easies hawses hissies chowses sis