kisser vs countenance

kisser and countenance both are nouns.

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

As nouns, kisser and countenance are synonyms defined as:

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

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

kisser (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
someone who kisses	the human face (`kisser' and `smiler' and `mug' are informal terms for `face' and `phiz' is British)
	formal and explicit approval

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