maternity vs sex activity

maternity and sex activity both are nouns.

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

maternity (noun)	sex activity (noun)
the quality of having or showing the tenderness and warmth and affection of or befitting a mother	activities associated with sexual intercourse
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