noble gas vs inert gas

noble gas and inert gas both are nouns.

Word	Noun	Adjective	Verb	Adverb
noble gas	Yes	No	No	No
inert gas	Yes	No	No	No

As nouns, noble gas and inert gas are synonyms defined as:

noble gas and inert gas: any of the chemically inert gaseous elements of the helium group in the periodic table

Other synonyms of noble gas include argonon.

noble gas (noun)	inert gas (noun)
any of the chemically inert gaseous elements of the helium group in the periodic table	any of the chemically inert gaseous elements of the helium group in the periodic table