tolerate vs countenance

tolerate is not a noun while countenance is a noun.

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

As verbs, countenance is a hypernym of tolerate; that is, countenance is a word with a broader meaning than tolerate:

Other hypernyms of tolerate include allow, let, permit.

As verbs, countenance is a hypernym of tolerate; that is, countenance is a word with a broader meaning than tolerate:

tolerate: allow the presence of or allow (an activity) without opposing or prohibiting
countenance: consent to, give permission; permit

Other hypernyms of tolerate include allow, let, permit.

tolerate (noun)	countenance (noun)
	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

tolerate (verb)	countenance (verb)
put up with something or somebody unpleasant	consent to, give permission; permit
allow the presence of or allow (an activity) without opposing or prohibiting
have a tolerance for a poison or strong drug or pathogen or environmental condition
recognize and respect (rights and beliefs of others)