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.
varna farina frena fraena virion wyvern fern firn
varna baron carny cornua airn arena carina barn barny bairn purana saran darn marina trona krona warn karn sharn grana yarn crania ruana farina reearn carn cornea jarina hernia cairn frena fraena hariana pirana sarin earn learn tarn koruna urania guarana shairn garni sharny corona yearn
var vair vara varia vary ovary