Good for Adsense profits?

I was experimenting with Google Traffic Estimator and found a few keywords that seem to be good - over 6 million searches a month and very low competition. But there are no Google ads at the side when I do a search. Does that mean it wouldnt be a good moneymaker for me based on AdSense revenue?

 

It's usually a good sign that it is not a good keyword for Adsense.

 

These days there are advertisements for any keyword. I'd do a Google Adwords check and download the results they give, to see how much a keyword costs on average to know if it's profitable or not.