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.
quest guest cuesta gust gusto gusty gusset keyset guessed coesite quizzed gooiest quayside cast cost gast kist
guest quest least beset besot gusto bust gusty gust doughiest gooiest lust best jest gest hest vesta beast hygeist wrest dusty oust shiest chest reset weest testa neist reest zesty pesto deist rest must rust cesta siesta just suety busty fusty joust hygieist geste geest heist faucet lusty dust fiesta fest feist feast east suet cuesta lest vest wriest test zooiest zest cesti rusty musty roust doest pesty resat pest nest testy west resit chesty yeast
cues guess kues quasi quass quassia queasy queazy queues queys aqueous squeeze ukes