* -ive: This suffix often indicates a characteristic or tendency, and can be used to form adjectives like cooperative, collaborative, or participative.
* -tion: This suffix denotes an action or process. You could use it to create nouns like cooperation, collaboration, or participation.
* -al: This suffix often signifies a quality or relationship. It can be used to create words like co-operational, collaborational, or participational (though these might sound a bit awkward).
Ultimately, the best suffix to use depends on the specific word you're trying to create and the meaning you want to convey.