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.
unease uneasy unais unaus unsew uns unsay unnoisy
unease beans uneasy tonneaus tense deans scenas paeans mense rennase means manse lense leans queans hyenas whenas kinase guanase cense hyaenas weans guineas tineas dense sense peans faenas hyponeas finesse veenas vinasse hanse jeans yeans