Reaktion

Very general and neutral: an answer or response to something said, asked, or happening. It does not especially emphasize emotion.

A brief reply, often witty or sharp in dialogue. It sounds more literary or formal than a simple reaction.

A reaction in response to something that has already happened, often implying opposition, a counter-move, or an opposite effect.

An echo, response, or audience reaction; it often refers not to one single reply but to how something was received.

Not a synonym for “reaction” in the ordinary sense; it is a political/ideological term for someone opposing progress and favoring a return to older systems.

The property of reacting easily or strongly to something; often used in science, medicine, or psychology rather than everyday conversation.

The ability to react quickly and appropriately; it can refer to a person, body, or system.

The way someone reacts; it emphasizes not the reaction itself, but how the response is carried out.

General behavior or manner of acting; it is not necessarily a response to a specific stimulus, so it is broader than “reaction.”

A reply or response, often in an argument, letter, or conversation; it sounds more literary and somewhat more formal.