hyperglycemia vs symptom

hyperglycemia and symptom both are nouns.

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

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

hyperglycemia: abnormally high blood sugar usually associated with diabetes
symptom: (medicine) any sensation or change in bodily function that is experienced by a patient and is associated with a particular disease

hyperglycemia (noun)	symptom (noun)
abnormally high blood sugar usually associated with diabetes	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