Is titanic abstract noun or collective noun?

Answer 1

The word 'titanic' is not a noun, it is an adjective that describes a noun as of exceptional strength, size, or power.

The capitalized word 'Titanic' is a proper noun, the name of a ship. The noun 'Titanic' is a concrete noun, the name of a physical object.

A collective noun is a word used to group people or things taken together as one whole in a descriptive way, for example a fleet of ships.

Answer 2

The noun 'Titanic' (capital T) is a singular, concrete, proper noun, the short name of a famous ship (the RMS Titanic); the name of a specific thing.

The word 'titanic' (lower case t) is an adjective, a word used to describe a noun as possessing exceptional strength, size, or power.