All terms in this list:

theatre: Often used specifically of playhouses and drama, so as to distinguish from moviehouses and cinema.

tragedy: A drama or similar work, in which the main character is brought to ruin or otherwise suffers the extreme consequences of some tragic flaw or weakness of character.

comedy: ancient Greece. a light, amusing play with a happy ending

character: A being involved in the action of a story.

role: A character or part played by a performer or actor.

conflict: A clash or disagreement, often violent, between two opposing groups or individuals.

resolution: A strong will, determination.

crisis: A crucial or decisive point or situation; a turning point.

dénouement: The conclusion or resolution of a plot.

proscenium arch: (in a theatre) the arch that frames a stage, and separates it from the auditorium

monologue: A type of art that consist of soliloquy, a long speech by one person.