visage vs expression

visage and expression both are nouns.

Word	Noun	Adjective	Verb	Adverb
visage	Yes	No	No	No
expression	Yes	No	No	No

As nouns, expression is a hyponym of visage; that is, expression is a word with a more specific, narrower meaning than visage:

Other hyponyms of visage include aspect, face, facial expression, look, poker face, devilishness.

visage (noun)	expression (noun)
the appearance conveyed by a person's face	the act of forcing something out by squeezing or pressing
the human face (`kisser' and `smiler' and `mug' are informal terms for `face' and `phiz' is British)	the feelings expressed on a person's face
	a word or phrase that particular people use in particular situations
	the style of expressing yourself
	expression without words
	a group of symbols that make a mathematical statement
	the communication (in speech or writing) of your beliefs or opinions
	a group of words that form a constituent of a sentence and are considered as a single unit
	(genetics) the process of expressing a gene