cocatalyst

As nouns the difference between cocatalyst and promoter

is that cocatalyst is either of a pair of cooperative catalysts that improve each others catalytic activity while promoter is one who promotes, particularly with respect to entertainment events or goods.

As nouns the difference between cooperative and cocatalyst

is that cooperative is a type of company that is owned partially or wholly by its employees, customers or tenants. Abbreviation: co-op while cocatalyst is either of a pair of cooperative catalysts that improve each others catalytic activity.

As an adjective cooperative

is ready to work with another person or in a team; ready to cooperate.