color barrier vs barrier

color barrier and barrier both are nouns.

Word	Noun	Adjective	Verb	Adverb
color barrier	Yes	No	No	No
barrier	Yes	No	No	No

As nouns, barrier is a hypernym of color barrier; that is, barrier is a word with a broader meaning than color barrier:

color barrier: the barrier preventing Blacks from participating in various activities with whites
barrier: any condition that makes it difficult to make progress or to achieve an objective

Other hypernyms of color barrier include roadblock.

color barrier (noun)	barrier (noun)
the barrier preventing Blacks from participating in various activities with whites	a structure or object that impedes free movement
	any condition that makes it difficult to make progress or to achieve an objective
	anything serving to maintain separation by obstructing vision or access