real world vs real life

real world and real life both are nouns.

Word	Noun	Adjective	Verb	Adverb
real world	Yes	No	No	No
real life	Yes	No	No	No

As nouns, real world and real life are synonyms defined as:

real world and real life: the practical world as opposed to the academic world

real world (noun)	real life (noun)
the practical world as opposed to the academic world	the practical world as opposed to the academic world