drama vs closet drama

drama and closet drama both are nouns.

Word	Noun	Adjective	Verb	Adverb
drama	Yes	No	No	No
closet drama	Yes	No	No	No

As nouns, closet drama is a hyponym of drama; that is, closet drama is a word with a more specific, narrower meaning than drama:

Other hyponyms of drama include comedy, melodrama, tragedy, liturgical drama.

drama (noun)	closet drama (noun)
the quality of being arresting or highly emotional	drama more suitable for reading than for performing
the literary genre of works intended for the theater
a dramatic work intended for performance by actors on a stage
an episode that is turbulent or highly emotional