humans vs human beings

humans and human beings both are nouns.

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

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

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

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

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