pernio vs chilblain

pernio and chilblain both are nouns.

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

As nouns, pernio and chilblain are synonyms defined as:

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

Other synonyms of pernio include chilblains.

pernio (noun)	chilblain (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