Motherhood
Part of speech: noun
Definition: the state of being a mother mothers as a group
Example sentence: Morality and its victim, the mother - what a terrible picture! Is there indeed anything more terrible, more criminal, than our glorified sacred function of motherhood?
Maternity
Part of speech: noun
Definition: The state of being a mother; motherhood.The state of being pregnant; pregnancy.A ward or department in a hospital in which babies are born.
Example sentence: The system in Sweden is great because you get free healthcare and free education; someone who doesn't have a lot of money can become a doctor or lawyer. There's good paternity and maternity leave - the U.S. is probably the only civilised country in the world that doesn't give parents anything.