megalocardia vs symptom

megalocardia and symptom both are nouns.

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

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

megalocardia: an abnormal enlargement of the heart
symptom: (medicine) any sensation or change in bodily function that is experienced by a patient and is associated with a particular disease

megalocardia (noun)	symptom (noun)
an abnormal enlargement of the heart	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