hypermenorrhea vs symptom

hypermenorrhea and symptom both are nouns.

Word	Noun	Adjective	Verb	Adverb
hypermenorrhea	Yes	No	No	No
symptom	Yes	No	No	No

As nouns, symptom is a hypernym of hypermenorrhea; that is, symptom is a word with a broader meaning than hypermenorrhea:

hypermenorrhea: abnormally heavy or prolonged menstruation; can be a symptom of uterine tumors and can lead to anemia if prolonged
symptom: (medicine) any sensation or change in bodily function that is experienced by a patient and is associated with a particular disease

Other hypernyms of hypermenorrhea include catamenia, flow, menses, menstruation, menstruum, period.

hypermenorrhea (noun)	symptom (noun)
abnormally heavy or prolonged menstruation; can be a symptom of uterine tumors and can lead to anemia if prolonged	anything that accompanies X and is regarded as an indication of X's existence
	(medicine) any sensation or change in bodily function that is experienced by a patient and is associated with a particular disease