military chaplain vs Holy Joe

military chaplain and Holy Joe both are nouns.

Word	Noun	Adjective	Verb	Adverb
military chaplain	Yes	No	No	No
Holy Joe	Yes	No	No	No

As nouns, military chaplain and Holy Joe are synonyms defined as:

military chaplain and Holy Joe: a chaplain in one of the military services

Other synonyms of military chaplain include padre, sky pilot.

military chaplain (noun)	Holy Joe (noun)
a chaplain in one of the military services	a chaplain in one of the military services