In order to get
additional keyword ideas you can use the Google Keyword Planner or Long Tail Pro (I created Long Tail Pro).
You can use this to get estimates about your proposed AdWords campaign or see
additional keyword ideas, average search volume, competition, and average CPC.
Not exact matches
It's not uncommon to run right to Google for
ideas (though your AdWords account provides more in - depth data than this free tool), but
Keyword Discovery, WordTracker, and other tools can provide
additional insights.