anemia vs symptom

anemia and symptom both are nouns.

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

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

anemia: a lack of vitality
symptom: (medicine) any sensation or change in bodily function that is experienced by a patient and is associated with a particular disease

anemia (noun)	symptom (noun)
a deficiency of red blood cells	anything that accompanies X and is regarded as an indication of X's existence
a lack of vitality	(medicine) any sensation or change in bodily function that is experienced by a patient and is associated with a particular disease