sex vs maternity

sex and maternity both are nouns.

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

sex (noun)	maternity (noun)
activities associated with sexual intercourse	the quality of having or showing the tenderness and warmth and affection of or befitting a mother
the properties that distinguish organisms on the basis of their reproductive roles	the kinship relation between an offspring and the mother
all of the feelings resulting from the urge to gratify sexual impulses	the state of being pregnant; the period from conception to birth when a woman carries a developing fetus in her uterus
either of the two categories (male or female) into which most organisms are divided

sex (verb)	maternity (verb)
tell the sex (of young chickens)
to evoke sexual feelings