women's liberation movement vs women's lib

women's liberation movement and women's lib both are nouns.

Word	Noun	Adjective	Verb	Adverb
women's liberation movement	Yes	No	No	No
women's lib	Yes	No	No	No

As nouns, women's liberation movement and women's lib are synonyms defined as:

women's liberation movement and women's lib: the movement aimed at equal rights for women

Other synonyms of women's liberation movement include feminism, feminist movement.

women's liberation movement (noun)	women's lib (noun)
the movement aimed at equal rights for women	the movement aimed at equal rights for women