pernio vs chilblains

pernio and chilblains both are nouns.

Word	Noun	Adjective	Verb	Adverb
pernio	Yes	No	No	No
chilblains	Yes	No	No	No

As nouns, pernio and chilblains are synonyms defined as:

pernio and chilblains: inflammation of the hands and feet caused by exposure to cold and moisture

Other synonyms of pernio include chilblain.

pernio (noun)	chilblains (noun)
inflammation of the hands and feet caused by exposure to cold and moisture	inflammation of the hands and feet caused by exposure to cold and moisture