What is the difference between woman and women?

Question

As a modifier of a plural noun, woman, like man, is exceptional in that the plural form women is used: women athletes; women students.

Answer 1

Woman is a singular noun whereas women is a plural noun. A woman is a woman, never a women.

Usage note for woman:

As a modifier of a plural noun, woman, like man, is exceptional in that the plural form women is used: women athletes; women students.