common front vs social movement

common front and social movement both are nouns.

Word	Noun	Adjective	Verb	Adverb
common front	Yes	No	No	No
social movement	Yes	No	No	No

As nouns, social movement is a hypernym of common front; that is, social movement is a word with a broader meaning than common front:

common front: a movement in which several individuals or groups with different interests join together
social movement: a group of people with a common ideology who try together to achieve certain general goals

Other hypernyms of common front include front, movement.

common front (noun)	social movement (noun)
a movement in which several individuals or groups with different interests join together	a group of people with a common ideology who try together to achieve certain general goals