feverishness vs excitation

feverishness and excitation both are nouns.

Word	Noun	Adjective	Verb	Adverb
feverishness	Yes	No	No	No
excitation	Yes	No	No	No

As nouns, excitation is a hypernym of feverishness; that is, excitation is a word with a broader meaning than feverishness:

Other hypernyms of feverishness include excitement, fervor, fervour, inflammation.

feverishness (noun)	excitation (noun)
a rise in the temperature of the body; frequently a symptom of infection	something that agitates and arouses
A state of wildly excited activity or emotion.	the neural or electrical arousal of an organ or muscle or gland
	the state of being emotionally aroused and worked up