world vs hemisphere

world and hemisphere both are nouns.

Word	Noun	Adjective	Verb	Adverb
world	Yes	Yes	No	No
hemisphere	Yes	No	No	No

world (noun)	hemisphere (noun)
all of the living human inhabitants of the earth	either half of the cerebrum
all of your experiences that determine how things appear to you	half of the terrestrial globe
the concerns of this life as distinguished from heaven and the afterlife	half of a sphere
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

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