No. It can be a noun or verb (to head). It can be a noun adjunct in terms such as chair arm.
adverb
what part of speech is beneath
i want to know what part of speech is camping
The part of speech is a adjective
Oppose is a verb.
The word "chair" can function as a noun.
The word "chair" can function as both a noun (referring to a piece of furniture with a seat for one person) and a verb (meaning to preside over a meeting or event).
spine of back part of chair
The part of speech for this particular word is a noun.
part of speech
The part of speech for "answer" is a noun.
what part of speech is beneath
adverb
The part of speech for "explicit" is an adjective.
The part of speech for "lecturer" is a noun.
The part of speech for "rapid" is an adjective.
The part of speech of "came" is a verb.