unexpressive vs poker-faced

unexpressive and poker-faced both are adjectives.

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

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

Other synonyms of unexpressive include deadpan, expressionless, impassive.

unexpressive (adjective)	poker-faced (adjective)
deliberately impassive in manner	deliberately impassive in manner