church officer vs functionary

church officer and functionary both are nouns.

Word	Noun	Adjective	Verb	Adverb
church officer	Yes	No	No	No
functionary	Yes	No	No	No

As nouns, functionary is a hypernym of church officer; that is, functionary is a word with a broader meaning than church officer:

Other hypernyms of church officer include official.

church officer (noun)	functionary (noun)
a church official	a worker who holds or is invested with an office