extragalactic nebula vs world

extragalactic nebula and world both are nouns.

Word	Noun	Adjective	Verb	Adverb
extragalactic nebula	Yes	No	No	No
world	Yes	Yes	No	No

extragalactic nebula (noun)	world (noun)
(astronomy) a collection of star systems; any of the billions of systems each having many stars and nebulae and dust	all of the living human inhabitants of the earth
	all of your experiences that determine how things appear to you
	the concerns of this life as distinguished from heaven and the afterlife
	people in general; especially a distinctive group of people with some shared interest
	people in general considered as a whole
	the 3rd planet from the sun; the planet we live on
	everything that exists anywhere
	a part of the earth that can be considered separately

extragalactic nebula (adjective)	world (adjective)
	involving the entire earth; not limited or provincial in scope