delivery vs lifesaving

delivery and lifesaving both are nouns.

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

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

delivery (noun)	lifesaving (noun)
recovery or preservation from loss or danger	saving the lives of drowning persons
the voluntary transfer of something (title or possession) from one party to another
the act of delivering a child
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
the act of delivering or distributing something (as goods or mail)
your characteristic style or manner of expressing yourself orally
the event of giving birth