Hello I was searching for a keyword to use for our website so i found a website that use a good list of keyword so i was planning to use the same also the descriptions is that issue if the owner found out ?
the only thing i've had trouble with is if you put a competitors name or .com in the meta tags... got a C&D for that once doubt they can do anything about generic keywords they don't own the copyright to
Yes, of course you can! But I doubt if it would be really effective based on the product/service you're promoting. I think it would be better if you would make those keywords (from your competitor) as your basis for your keyword research and start your own keyword analysis that would be exactly fit in with your website.
I assume you're referring to their meta keywords, if this is the case then that's fair game. The problem I see with that is you're betting that they know how to properly do keyword research and chose the best keywords possible. You may actually be able to find better keywords if you'd put in the time to research them. Not to mention your site/content has to be built around these keywords, you can't just add random meta keywords. Everything needs to be based around your chosen keywords for maximum On-page SEO. Not sure what "Descriptions" you're talking about but over all this is a bad tactic and will only hurt your site in the long run.