rosacea vs acne rosacea

rosacea and acne rosacea both are nouns.

Word	Noun	Adjective	Verb	Adverb
rosacea	Yes	No	No	No
acne rosacea	Yes	No	No	No

As nouns, rosacea and acne rosacea are synonyms defined as:

rosacea and acne rosacea: a skin disease of adults (more often women) in which blood vessels of the face enlarge resulting in a flushed appearance

rosacea (noun)	acne rosacea (noun)
a skin disease of adults (more often women) in which blood vessels of the face enlarge resulting in a flushed appearance	a skin disease of adults (more often women) in which blood vessels of the face enlarge resulting in a flushed appearance