Catalysation vs. Catalysis: What's the Difference?

Catalysis.

The action of a catalyst, especially an increase in the rate of a chemical reaction.

(chemistry) The increase of the rate of a chemical reaction, induced by a catalyst.

Dissolution; degeneration; decay.

A process by which a chemical reaction is accelerated in the presence of certain agents which were formerly believed to exert an influence by mere contact. It is now believed that such reactions are attended with the formation of an intermediate compound or compounds, so that by alternate composition and decomposition the agent is apparenty left unchanged; as, the catalysis of making ether from alcohol by means of sulphuric acid; or catalysis in the action of enzymes (as diastase, or ptyalin) on starch.

Acceleration of a chemical reaction induced the presence of material that is chemically unchanged at the end of the reaction;