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.
pipals pipeless peplus peplos pupils papules peepuls peoples popples papulose popeless populous papillose populace
pals nopals pipals keypals sepals opals appals tepals copals cupels nopales apples lapels couples pails palsy pupils spales peplos rappels pols appalls peals palls nipples dapples topples peoples whooplas appels tapalos fipples maples ripples spails huipils hooplas peepuls pawls puls spalls hopples popples pales appeals repeals peplus repels supples tipples wheeples plus chapels