porter vs ticket taker

porter and ticket taker both are nouns.

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

As nouns, ticket taker is a hyponym of porter; that is, ticket taker is a word with a more specific, narrower meaning than porter:

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

Other hyponyms of porter include commissionaire, night porter, ticket collector.

porter (noun)	ticket taker (noun)
a very dark sweet ale brewed from roasted unmalted barley	someone who is paid to admit only those who have purchased tickets
a person employed to carry luggage and supplies
a railroad employee who assists passengers (especially on sleeping cars)
someone who guards an entrance

porter (verb)	ticket taker (verb)
carry luggage or supplies