The word 'masterpiece' is a noun, a word for an outstanding work of art or other endeavor; a word for a thing.
A noun functions as the subject of a sentence or a clause, and as the object of a verb or a preposition.
Example uses:
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.
Masterpiece is a noun.
The part of speech for this particular word is a noun.
part of speech
Masterpiece Theatre - 1971 Tess of the D'Urbervilles Part 1 was released on: USA: 4 January 2009
The part of speech for "answer" is a noun.
adverb
what part of speech is beneath
The part of speech for "unfamiliar" is an adjective.
The part of speech of "came" is a verb.
The part of speech for "twirl" is a verb.
The part of speech for "explicit" is an adjective.
The part of speech for "indefinite" is an adjective.