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.
giantess giants gentes genettes gents genets jaunts joints gentoos juntas juntos
giantess countess annates notes nites contes coonties aunties antes contessa counties gunites kentes quintes mentees mannites panties pinites pointes punties reunites cenotes sienites denotes dunites tannates unties chanties shanties montes nates connotes neonates enates finites hyphenates phenates phonates gentes bounties banties gahnites kainites keynotes lenites minutes mantes penates pintoes pontes rentes ruinates senates dainties donates dunnites unites chanteys shanteys yentes