Specificity of Keywords

What rules, specificity or CPC?

[Jakes Redding]

I’m just at the point of starting an Adwords campaign and have a question concerning the specificity of keywords. How does it work when a search query calls for one of my keywords that is covered both generally and specifically? For instance, a query is done for BIG GREEN WIDGET, and I have in my campaign the keyword phrases GREEN WIDGET and BIG GREEN WIDGET, but with different CPC’s. Which one gets used? The more specific keyword phrase or the one that would result in a higher position? Any ideas? Thanks.

[RhinoFish]

"The more specific keyword phrase or the one that would result in a higher position"

The one that would rank higher, which is the very likely to be the one that is more specific.

This help guide discusses what happens when you have the same keyword in multiple places, but the answer extends to which keyword gets triggered when words are similar:
[adwords.google.com...]