acrocyanosis vs Raynaud's sign

acrocyanosis and Raynaud's sign both are nouns.

Word	Noun	Adjective	Verb	Adverb
acrocyanosis	Yes	No	No	No
Raynaud's sign	Yes	No	No	No

As nouns, acrocyanosis and Raynaud's sign are synonyms defined as:

acrocyanosis and Raynaud's sign: cyanosis of the extremities; can occur when a spasm of the blood vessels is caused by exposure to cold or by strong emotion

acrocyanosis (noun)	Raynaud's sign (noun)
cyanosis of the extremities; can occur when a spasm of the blood vessels is caused by exposure to cold or by strong emotion	cyanosis of the extremities; can occur when a spasm of the blood vessels is caused by exposure to cold or by strong emotion