drama vs episode

drama and episode both are nouns.

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

As nouns, episode is a hypernym of drama; that is, episode is a word with a broader meaning than drama:

drama (noun)	episode (noun)
the quality of being arresting or highly emotional	film consisting of a succession of related shots that develop a given subject in a movie
the literary genre of works intended for the theater	a part of a broadcast serial
a dramatic work intended for performance by actors on a stage	a brief section of a literary or dramatic work that forms part of a connected series
an episode that is turbulent or highly emotional	a happening that is distinctive in a series of related events