Is needed common noun

Answer 1

The word 'needed' is not a noun.

The word 'needed' is the past participle, past tense of the verb to need.

The past participle of the verb also functions as an adjective.

Examples:

They needed more money to complete the project. (verb)

The committee finally released the needed funding. (adjective)

The word need functions as both a noun (need, needs) and a verb (need, needs, needing, needed).

The noun 'need' is a common noun.

Answer 2

Yes, "needed" is a common noun. It refers to something that is required or necessary.