cognitive science vs science

cognitive science and science both are nouns.

Word	Noun	Adjective	Verb	Adverb
cognitive science	Yes	No	No	No
science	Yes	No	No	No

As nouns, science is a hypernym of cognitive science; that is, science is a word with a broader meaning than cognitive science:

cognitive science: the field of science concerned with cognition; includes parts of cognitive psychology and linguistics and computer science and cognitive neuroscience and philosophy of mind
science: a particular branch of scientific knowledge

Other hypernyms of cognitive science include scientific discipline.

cognitive science (noun)	science (noun)
the field of science concerned with cognition; includes parts of cognitive psychology and linguistics and computer science and cognitive neuroscience and philosophy of mind	a particular branch of scientific knowledge
	ability to produce solutions in some problem domain