director vs managing director

director and managing director both are nouns.

Word	Noun	Adjective	Verb	Adverb
director	Yes	No	No	No
managing director	Yes	No	No	No

As nouns, director and managing director are synonyms defined as:

director and managing director: someone who controls resources and expenditures

Other synonyms of director include manager.

director (noun)	managing director (noun)
someone who controls resources and expenditures	someone who controls resources and expenditures
the person who leads a musical group
someone who supervises the actors and directs the action in the production of a show
member of a board of directors
the person who directs the making of a film