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.
askos asks ascus azygos assagais assegais
askos bisks tusks tasks disks desks rusks piscos mosks kiosks cusks casks husks fiascos busks bosks basks sickos asks suks soukous skis skas masks musks risks ciscos discos dusks tsks whisks