furring vs symptom

furring and symptom both are nouns.

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

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

furring: a furlike coating of matter as on the tongue
symptom: (medicine) any sensation or change in bodily function that is experienced by a patient and is associated with a particular disease

furring (noun)	symptom (noun)
strip used to give a level surface for attaching wallboard	anything that accompanies X and is regarded as an indication of X's existence
a furlike coating of matter as on the tongue	(medicine) any sensation or change in bodily function that is experienced by a patient and is associated with a particular disease