women's lib vs women's liberation movement

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

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

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

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

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

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