metrorrhagia vs haemorrhage

metrorrhagia and haemorrhage both are nouns.

Word	Noun	Adjective	Verb	Adverb
metrorrhagia	Yes	No	No	No
haemorrhage	Yes	No	No	No

As nouns, haemorrhage is a hypernym of metrorrhagia; that is, haemorrhage is a word with a broader meaning than metrorrhagia:

metrorrhagia: bleeding from the uterus that is not due to menstruation; usually indicative of disease (as cervical cancer)
haemorrhage: the flow of blood from a ruptured blood vessel

Other hypernyms of metrorrhagia include bleeding, hemorrhage.

metrorrhagia (noun)	haemorrhage (noun)
bleeding from the uterus that is not due to menstruation; usually indicative of disease (as cervical cancer)	the flow of blood from a ruptured blood vessel