Behaviour/behavior is a noun.
The word behaviour is a noun. It is the way in which one behaves.
'Acceptable' is an adjective: 'He did not display an acceptable standard of behaviour.'
candour means:Nounhonesty and straightforwardness of speech or behaviour [Latin candor]
part of speech
The part of speech for this particular word is a noun.
The part of speech for "answer" is a noun.
adverb
what part of speech is beneath
The part of speech for "explicit" is an adjective.
The part of speech for "twirl" is a verb.
The part of speech for "unfamiliar" is an adjective.
The part of speech of "came" is a verb.