dramatic irony vs theater

dramatic irony and theater both are nouns.

Word	Noun	Adjective	Verb	Adverb
dramatic irony	Yes	No	No	No
theater	Yes	No	No	No

dramatic irony (noun)	theater (noun)
(theater) irony that occurs when the meaning of the situation is understood by the audience but not by the characters in the play	a building where theatrical performances or motion-picture shows can be presented
	the art of writing and producing plays
	a region in which active military operations are in progress