shutterbug vs enthusiast

shutterbug and enthusiast both are nouns.

Word	Noun	Adjective	Verb	Adverb
shutterbug	Yes	No	No	No
enthusiast	Yes	No	No	No

As nouns, enthusiast is a hypernym of shutterbug; that is, enthusiast is a word with a broader meaning than shutterbug:

Other hypernyms of shutterbug include partisan, partizan.

shutterbug (noun)	enthusiast (noun)
a photography enthusiast	an ardent and enthusiastic supporter of some person or activity
	a person having a strong liking for something