Is collision a concrete noun

Answer 1

The noun 'collision' is a concrete noun as a word for a crash in which two or more things or people hit each other; a word for a physical thing.
Example: The officer took measurements at the scene of the collision.

The noun 'collision' is an abstract noun as a word for a situation in which people or groups disagree; a word for a concept.
Example: A collision of principles eventually drove them apart.

Answer 2

Yes, "collision" is a concrete noun because it refers to a tangible, physical event involving the impact of two or more objects or entities.