gravida vs gestation

gravida and gestation both are nouns.

Word	Noun	Adjective	Verb	Adverb
gravida	Yes	No	No	No
gestation	Yes	No	No	No

As nouns, gestation is a hypernym of gravida; that is, gestation is a word with a broader meaning than gravida:

gravida: the number of the pregnancy that a woman is in
gestation: the state of being pregnant; the period from conception to birth when a woman carries a developing fetus in her uterus

Other hypernyms of gravida include maternity, pregnancy.

gravida (noun)	gestation (noun)
a pregnant woman	the conception and development of an idea or plan
the number of the pregnancy that a woman is in	the state of being pregnant; the period from conception to birth when a woman carries a developing fetus in her uterus
	the period during which an embryo develops (about 266 days in humans)