doorkeeper vs ostiary

doorkeeper and ostiary both are nouns.

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

As nouns, doorkeeper and ostiary are synonyms defined as:

Other synonyms of doorkeeper include door guard, doorman, gatekeeper, hall porter, porter.

As nouns, doorkeeper and ostiary are synonyms defined as:

doorkeeper and ostiary: the lowest of the minor Holy Orders in the unreformed Western Church but now suppressed by the Roman Catholic Church

Other synonyms of doorkeeper include ostiarius.

doorkeeper (noun)	ostiary (noun)
someone who guards an entrance	someone who guards an entrance
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
the lowest of the minor Holy Orders in the unreformed Western Church but now suppressed by the Roman Catholic Church