phiz vs countenance

phiz and countenance both are nouns.

Word	Noun	Adjective	Verb	Adverb
phiz	Yes	No	No	No
countenance	Yes	No	Yes	No

As nouns, phiz and countenance are synonyms defined as:

phiz and countenance: the human face (`kisser' and `smiler' and `mug' are informal terms for `face' and `phiz' is British)

Other synonyms of phiz include kisser, mug, physiognomy, smiler, visage.

phiz (noun)	countenance (noun)
the human face (`kisser' and `smiler' and `mug' are informal terms for `face' and `phiz' is British)	the appearance conveyed by a person's face
	the human face (`kisser' and `smiler' and `mug' are informal terms for `face' and `phiz' is British)
	formal and explicit approval

phiz (verb)	countenance (verb)
	consent to, give permission; permit