Techniques for cross-selling keywords among keyword bidding entities (e.g., advertisers) based upon bidding patterns are provided. Utilizing a keyword suggestion tool in accordance with one embodiment, upon receipt of a first keyword, may examine all additional keywords that have been paired with the first keyword in the bidding patterns of other bidding entities and recommend one or more of the paired keywords to the bidding entity for consideration. In another embodiment, a keyword suggestion tool, upon receipt of a keyword from a first bidding entity, may examine the bidding pattern of the first bidding entity in comparison to the bidding patterns of other bidding entities to identify bidding entities that are similar to the bidding entity. Recommendations may then be made to the first bidding entity based upon keywords that the identified similar bidding entities have bid.