What type of noun is super giants?

Answer 1

In the term 'super giants', the noun giants is the plural form for the noun giant.The noun 'giant' is a common noun, a word for an imaginary or mythical being of superhuman size; a person or thing that has grown larger than a standard of its kind.

The word 'super' is an adjective that describes the noun 'giants'.

The term 'super giants' is a noun phrase. A noun phrase is

any word or group of words based on a noun or pronoun

(without a verb) that can function in a sentence as a subject, object of a verb or a preposition.