commissionaire vs doorkeeper

commissionaire and doorkeeper both are nouns.

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

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

Other hypernyms of commissionaire include door guard, doorman, gatekeeper, hall porter, ostiary, porter.

commissionaire (noun)	doorkeeper (noun)
a uniformed doorman	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