Can't really answer properly from the info you have given. What is the adsense CPC? Is there an amazon product related to this keyword? And as mentioned above what is the competition like?
I recommend you look up a keyword research guide on this forum, and learn about buyer keywords, long tails, etc. Then when you start finding keywords that interest you, run them through Keyword Revealer, which is a free site that measures competition and suggests similar keywords. Don't consider this site as a be all, and end all. Use it to weed out the more competitive keywords, and focus on "low", and "very low" competition.
Good luck to ya.