poker-faced vs impassive

poker-faced and impassive both are adjectives.

Word	Noun	Adjective	Verb	Adverb
poker-faced	No	Yes	No	No
impassive	No	Yes	No	No

As adjectives, poker-faced and impassive are synonyms defined as:

Other synonyms of poker-faced include deadpan, expressionless, unexpressive.

poker-faced (adjective)	impassive (adjective)
deliberately impassive in manner	deliberately impassive in manner
	having or revealing little emotion or sensibility; not easily aroused or excited