COOPERATIVE can be used both as a noun and as an adjective. Maurice is a member of the livestock cooperative in this area. (as a noun) - "livestock cooperative" : an organization/enterprise created by and/or collectively owned by livestock farmers Anthony was very cooperative during the investigation. (as an adjective) - "very cooperative" : very helpful/very willing to cooperate COLLABORATIVE is commonly used as an adjective, BUT... it can also be used as a noun. The final design was a result of our collaborative effort. (as an adjective) - "collaborative effort" : means we all worked together/everyone in the team contributed enough effort to produce the final design "The Collaborative®" - It's a company name. So, in this case, it is a noun. I hope that helps :)