enthusiasm vs rabidity

enthusiasm and rabidity both are nouns.

Word	Noun	Adjective	Verb	Adverb
enthusiasm	Yes	No	No	No
rabidity	Yes	No	No	No

As nouns, rabidity is a hyponym of enthusiasm; that is, rabidity is a word with a more specific, narrower meaning than enthusiasm:

Other hyponyms of enthusiasm include lyricism, madness, rabidness.

enthusiasm (noun)	rabidity (noun)
overflowing with eager enjoyment or approval	unrestrained excitement or enthusiasm
a lively interest	The property of being very extreme, unreasonable, or fanatical in opinion; excessively zealous; comparable to one with rabies.
a feeling of excitement