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.
spiker spikier speaker spookery spookier
piker spiker spookery packer speaker pawkier peakier pecker peckier pickeer picker piggier pickier pockier poker pokier pucker puckery puggier spikier spookier
spik spike spikey spiky sepic spake spic spica spicae spick spoke aspic