human race vs human beings

human race and human beings both are nouns.

Word	Noun	Adjective	Verb	Adverb
human race	Yes	No	No	No
human beings	Yes	No	No	No

As nouns, human race and human beings are synonyms defined as:

human race and human beings: all of the living human inhabitants of the earth

Other synonyms of human race include humanity, humankind, humans, man, mankind, world.

human race (noun)	human beings (noun)
all of the living human inhabitants of the earth	all of the living human inhabitants of the earth