doorman vs porter

doorman and porter both are nouns.

Word	Noun	Adjective	Verb	Adverb
doorman	Yes	No	No	No
porter	Yes	No	Yes	No

As nouns, doorman and porter are synonyms defined as:

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

doorman (noun)	porter (noun)
someone who guards an entrance	a very dark sweet ale brewed from roasted unmalted barley
	a person employed to carry luggage and supplies
	a railroad employee who assists passengers (especially on sleeping cars)
	someone who guards an entrance

doorman (verb)	porter (verb)
	carry luggage or supplies