coadjutor vs helper

coadjutor and helper both are nouns.

Word	Noun	Adjective	Verb	Adverb
coadjutor	Yes	No	No	No
helper	Yes	No	No	No

As nouns, helper is a hypernym of coadjutor; that is, helper is a word with a broader meaning than coadjutor:

coadjutor: an assistant to a bishop
helper: a person who contributes to the fulfillment of a need or furtherance of an effort or purpose

Other hypernyms of coadjutor include assistant, help, supporter.

coadjutor (noun)	helper (noun)
an assistant to a bishop	a person who helps people or institutions (especially with financial help)
	a person who contributes to the fulfillment of a need or furtherance of an effort or purpose