ticket taker vs hall porter

ticket taker and hall porter both are nouns.

Word	Noun	Adjective	Verb	Adverb
ticket taker	Yes	No	No	No
hall porter	Yes	No	No	No

As nouns, hall porter is a hypernym of ticket taker; that is, hall porter is a word with a broader meaning than ticket taker:

ticket taker: someone who is paid to admit only those who have purchased tickets
hall porter: someone who guards an entrance

Other hypernyms of ticket taker include door guard, doorkeeper, doorman, gatekeeper, ostiary, porter.

ticket taker (noun)	hall porter (noun)
someone who is paid to admit only those who have purchased tickets	someone who guards an entrance