Here are some words with the prefix "cata-":
Related to destruction or downfall:
* Catastrophe: A sudden and disastrous event.
* Cataclysm: A sudden and violent upheaval, especially one that causes great destruction.
* Catacombs: Underground tunnels or passages, especially those used as burial places by early Christians.
* Catapult: A device that launches objects with great force.
* Cataclysmic: Pertaining to a cataclysm.
Related to completeness or thoroughness:
* Catalogue: A list or record of things.
* Categorize: To place into categories.
* Catalyst: Something that causes or accelerates a change.
* Catatonic: Characterized by a state of rigidity and immobility.
Other words:
* Catamenia: Menstruation.
* Cataplexy: A sudden loss of muscle control.
* Catachresis: The use of a word in a way that is not its literal meaning.
* Catachrestic: Pertaining to catachresis.
Remember that the meaning of "cata-" can be slightly nuanced depending on the word. It is often used to indicate something that is downward, destructive, complete, or thorough.