doorkeeper vs clergyman

doorkeeper and clergyman both are nouns.

Word	Noun	Adjective	Verb	Adverb
doorkeeper	Yes	No	No	No
clergyman	Yes	No	No	No

As nouns, clergyman is a hypernym of doorkeeper; that is, clergyman is a word with a broader meaning than doorkeeper:

doorkeeper: the lowest of the minor Holy Orders in the unreformed Western Church but now suppressed by the Roman Catholic Church
clergyman: a member of the clergy and a spiritual leader of the Christian Church

Other hypernyms of doorkeeper include man of the cloth, reverend, Holy Order, Order.

doorkeeper (noun)	clergyman (noun)
someone who guards an entrance	a member of the clergy and a spiritual leader of the Christian Church
an official stationed at the entrance of a courtroom or legislative chamber
the lowest of the minor Holy Orders in the unreformed Western Church but now suppressed by the Roman Catholic Church