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.
assesses asceses ascesis assizes
assesses reassesses cesses recesses possesses seises asceses masseuses byssuses missises ceases noesises deceases caseases diseases sasses missuses whosises tussises cassises sisses disseises misuses passuses sises susses risuses miseases dioceses lususes diseuses caseoses disuses whoosises wiseasses