hall porter vs gatekeeper

hall porter and gatekeeper both are nouns.

Word	Noun	Adjective	Verb	Adverb
hall porter	Yes	No	No	No
gatekeeper	Yes	No	No	No

As nouns, hall porter and gatekeeper are synonyms defined as:

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

hall porter (noun)	gatekeeper (noun)
someone who guards an entrance	someone who guards an entrance
	someone who controls access to something