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.
queridas corridas curds grids grides gourds quirts kurtas guards quarts cardias quartos caritas quartes curites keratose cords cruds creds crits cards grads grits crowds gratis kraits groats crudes cairds cruets curtsy carats courts griots greats karats credos korats curets quartz creeds greeds
queridas corridas rids hydroids sciurids droids irides lariats purdahs periods hayrides nereids hydrides triads murids grides viroids hybrids grids raids giardias irids hardass brides veritas caritas jerids braids prides pardahs myriads marrieds jerrids aroids cardias rides borides bourrides joyrides purdas derides druids hydrids toroids choroids