dialogue vs literary work

dialogue and literary work both are nouns.

Word	Noun	Adjective	Verb	Adverb
dialogue	Yes	No	No	No
literary work	Yes	No	No	No

As nouns, literary work is a hypernym of dialogue; that is, literary work is a word with a broader meaning than dialogue:

dialogue: a literary composition in the form of a conversation between two people
literary work: imaginative or creative writing

Other hypernyms of dialogue include literary composition.

dialogue (noun)	literary work (noun)
the lines spoken by characters in drama or fiction	imaginative or creative writing
a conversation between two persons
a literary composition in the form of a conversation between two people
a discussion intended to produce an agreement