enthusiasm vs involvement

enthusiasm and involvement both are nouns.

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

As nouns, involvement is a hypernym of enthusiasm; that is, involvement is a word with a broader meaning than enthusiasm:

enthusiasm: a lively interest
involvement: a sense of concern with and curiosity about someone or something

Other hypernyms of enthusiasm include interest.

enthusiasm (noun)	involvement (noun)
overflowing with eager enjoyment or approval	the act of sharing in the activities of a group
a lively interest	a sense of concern with and curiosity about someone or something
a feeling of excitement	a connection of inclusion or containment
	a usually secretive or illicit sexual relationship
	the condition of sharing in common with others (as fellows or partners etc.)