they are dictionary words, not 'keywords' in the sense of being 'key' words. plus the .ws extension as a domain ext stinks and requires quite a bit of work to build a brand around
Always think about this when buying domains. Think if there are thousands of tlds hitting the markets in the next few years with better sounding extensions why would anyone be interested in extensions that sound like .biz or .ws just think. Then you will find out the answer for yourself.