blush vs rouge

blush and rouge both are nouns.

Word	Noun	Adjective	Verb	Adverb
blush	Yes	No	Yes	No
rouge	Yes	No	Yes	No

As nouns, blush and rouge are synonyms defined as:

blush and rouge: makeup consisting of a pink or red powder applied to the cheeks

Other synonyms of blush include blusher, paint.

blush (noun)	rouge (noun)
sudden reddening of the face (as from embarrassment or guilt or shame or modesty)	makeup consisting of a pink or red powder applied to the cheeks
makeup consisting of a pink or red powder applied to the cheeks
a rosy color (especially in the cheeks) taken as a sign of good health

blush (verb)	rouge (verb)
turn red, as if in embarrassment or shame	redden by applying rouge to
become rosy or reddish