Free World vs collection

Free World and collection both are nouns.

Word	Noun	Adjective	Verb	Adverb
Free World	Yes	No	No	No
collection	Yes	No	No	No

As nouns, collection is a hypernym of Free World; that is, collection is a word with a broader meaning than Free World:

Other hypernyms of Free World include accumulation, aggregation, assemblage.

Free World (noun)	collection (noun)
anti-communist countries collectively	the act of gathering something together
	a publication containing a variety of works
	request for a sum of money
	several things grouped together or considered as a whole