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.
sigmas skims skimos zeugmas zygomas scams scums squamose squamous
agmas magmas zeugmas sigmas dogmas caeomas dicambas camas gamays jugums gammas gambas camass comas commas gamas zygomas leucomas leukaemias gummas leukemias macumbas gams leukomas ogams gums agamas degums begums digammas jicamas chacmas