motherhood vs maternity

motherhood and maternity both are nouns.

Word	Noun	Adjective	Verb	Adverb
motherhood	Yes	No	No	No
maternity	Yes	No	No	No

As nouns, motherhood and maternity are synonyms defined as:

motherhood and maternity: the kinship relation between an offspring and the mother

motherhood (noun)	maternity (noun)
the kinship relation between an offspring and the mother	the quality of having or showing the tenderness and warmth and affection of or befitting a mother
	the kinship relation between an offspring and the mother
	the state of being pregnant; the period from conception to birth when a woman carries a developing fetus in her uterus