arts vs film studies

arts and film studies both are nouns.

Word	Noun	Adjective	Verb	Adverb
arts	Yes	No	No	No
film studies	Yes	No	No	No

As nouns, film studies is a hyponym of arts; that is, film studies is a word with a more specific, narrower meaning than arts:

arts: studies intended to provide general knowledge and intellectual skills (rather than occupational or professional skills)
film studies: an academic discipline that deals with various theoretical, historical, and critical approaches to films.

arts (noun)	film studies (noun)
studies intended to provide general knowledge and intellectual skills (rather than occupational or professional skills)	an academic discipline that deals with various theoretical, historical, and critical approaches to films.