Is head a proper noun or common noun?

Answer 1

Head nouns are repeated with conjoined articles or prepositions.

For example:

Correct: Use a 3.5-inch or a 5.5-inch disk.

Incorrect: Use a 3.5-inch or 5.5-inch disk

Correct: Authorize the access to trusted networks or to internal networks.

Incorrect: Authorize the access to trusted or internal networks.

Answer 2

The noun 'head' is a common noun, a general word for a body part or a person in charge.

A proper noun is the name of a specific person, place, or thing.

Examples of proper nouns for the common noun 'head' are Edith Head (American costume designer, winner of eight Academy Awards) or Head and Shoulders Shampoo.