What kind of noun is good deeds?

The term 'good deeds' is a noun phrase, 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. A noun phrase can be one Word or many Words.

The phrase 'good deeds' is made up of the adjective 'good' describing the noun 'deeds'.