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.
peplos peplus peepuls peoples papulose populous papillose pipals pupils popples pipeless popeless papules
peplos pillows ploys plus plows polos populous pipals rappels papillose peepuls nopals sepalous maples replows supples keypals deploys huipils tapalos couples tipples pilose tupelos pilous whooplas hooplas polios pals lapels apollos puls appals peoples popples peplus pupils opals papulose nipples ripples repels pols sepals cupels dapples hopples diploes copals tepals apples topples appels wheeples fipples chapels