excitement vs joyousness

excitement and joyousness both are nouns.

Word	Noun	Adjective	Verb	Adverb
excitement	Yes	No	No	No
joyousness	Yes	No	No	No

As nouns, joyousness is a hypernym of excitement; that is, joyousness is a word with a broader meaning than excitement:

Other hypernyms of excitement include joy, joyfulness.

excitement (noun)	joyousness (noun)
something that agitates and arouses	the emotion of great happiness
disturbance usually in protest
the feeling of lively and cheerful joy
the state of being emotionally aroused and worked up