unfriendliness vs temperament

unfriendliness and temperament both are nouns.

Word	Noun	Adjective	Verb	Adverb
unfriendliness	Yes	No	No	No
temperament	Yes	No	No	No

As nouns, temperament is a hypernym of unfriendliness; that is, temperament is a word with a broader meaning than unfriendliness:

Other hypernyms of unfriendliness include disposition.

unfriendliness (noun)	temperament (noun)
an unfriendly disposition	an adjustment of the intervals (as in tuning a keyboard instrument) so that the scale can be used to play in different keys
dislike experienced as an absence of friendliness	your usual mood
	excessive emotionalism or irritability and excitability (especially when displayed openly)