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.
picaro picara picker pickeer pickier piker pecker pokier pakora pucker packer pawkier peakier peckier piggery piggier pockier puckery pugaree puggier puggaree
picaro car daycare soucar scary scar care carr crow karoo acari buckaroo buckayro vicar jackaroo macro micro mucro picara saguaro scare scaur sowcar decare
pica pic paca pick picky pika epic spic spica spicae spick