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.
heriots hearts hertz hurts herds hearties harts hairdos heredes haeredes hayrides hards hurds hoards hordes hardass hardies hurdies
riots heriots chariots griots rots worrits iritis rotas roots rites ferrites frits verites bruits fruits rotis groats trots brits veritas grouts lariats neuritis parrots peritus pyrites rewrites sorites droits territs cheroots rotos routs rotes merits garrotes curites grits garotes britts writes barites cowrites frites caritas fritts burritos kraits crits grots norites periods pierrots yperites cerites diorites tarots traits trouts writs carrots sheroots