maternity hospital vs hospital

maternity hospital and hospital both are nouns.

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

As nouns, hospital is a hypernym of maternity hospital; that is, hospital is a word with a broader meaning than maternity hospital:

maternity hospital: a hospital that provides care for women during pregnancy and childbirth and for newborn infants
hospital: a health facility where patients receive treatment

Other hypernyms of maternity hospital include infirmary.

maternity hospital (noun)	hospital (noun)
a hospital that provides care for women during pregnancy and childbirth and for newborn infants	a health facility where patients receive treatment
	a medical institution where sick or injured people are given medical or surgical care