Targeting for high paying keywords in Google AdSense would help you earn more by getting higher cost-per-click ads for your website. One of the method to searching for the high paying keywords is by using Keyword Tool in Google AdWords.

To search for the high paying keywords, go to the Keyword Tool's website and follow these steps.

The first step is to search for a base keyword that you want to target. In this example, adsense is used.

Enter the keyword adsense in the Word or phrase textarea. you can insert more than one keyword, one per line.

Fill in the word as in the captcha image to verify that you're human and not automating your keyword search.

To see the CPC of each keywords, you'll need to enable the Estimated Avg. CPC column. To do this, select the option from the select list on the upper right of the result table and click Apply

Click on the Search button to start searching.

You'll get the result somewhat as the following. Do note the estimated average cost per click on the right side of the table.

The result by default will display keyword suggestions based on the relevancy of the keyword being search. You'll want to sort it out based on the average CPC.

To do this, click on the Sorted by relevance select list on the result table header, and choose Estimated Avg. CPC.

The result is now sorted based on the highest acerage CPC. You can start targeting your website for the keyword on top of the list.