delivery vs post

delivery and post both are nouns.

Word	Noun	Adjective	Verb	Adverb
delivery	Yes	No	No	No
post	Yes	No	Yes	No

As nouns, post is a hyponym of delivery; that is, post is a word with a more specific, narrower meaning than delivery:

delivery: the act of delivering or distributing something (as goods or mail)
post: the delivery and collection of letters and packages

Other hyponyms of delivery include airdrop, consignment, handing over, passage, service, service of process, serving.

delivery (noun)	post (noun)
recovery or preservation from loss or danger	a job in an organization
the voluntary transfer of something (title or possession) from one party to another	the delivery and collection of letters and packages
the act of delivering a child	an upright consisting of a piece of timber or metal fixed firmly in an upright position
the act of throwing a baseball or softball by the pitcher towards home plate, which initiates play by giving the batter a chance to hit it	military installation at which a body of troops is stationed
the act of delivering or distributing something (as goods or mail)	the system whereby messages are transmitted via the post office
your characteristic style or manner of expressing yourself orally	a pole or stake set up to mark something (as the start or end of a race track)
the event of giving birth	A message on a social media website
	any particular collection of letters or packages that is delivered
	the position where someone (as a guard or sentry) stands or is assigned to stand

delivery (verb)	post (verb)
	display, as of records in sports games
	mark or expose as infamous
	cause to be directed or transmitted to another place
	publicize with, or as if with, a poster
	To post a message on a social media website
	assign to a station
	place so as to be noticed
	mark with a stake
	affix in a public place or for public notice
	ride Western style and bob up and down in the saddle in rhythm with a horse's trotting gait
	transfer (entries) from one account book to another
	enter on a public list
	assign to a post; put into a post