gravida vs pregnancy

gravida and pregnancy both are nouns.

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

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

gravida: the number of the pregnancy that a woman is in
pregnancy: 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 gestation, maternity.

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