theatre vs dramatics

theatre and dramatics both are nouns.

Word	Noun	Adjective	Verb	Adverb
theatre	Yes	No	No	No
dramatics	Yes	No	No	No

As nouns, theatre and dramatics are synonyms defined as:

Other synonyms of theatre include dramatic art, dramaturgy, theater.

theatre (noun)	dramatics (noun)
a building where theatrical performances or motion-picture shows can be presented	participation in theatrical productions as an extracurricular activity
the art of writing and producing plays	the art of writing and producing plays
a region in which active military operations are in progress