cryptology vs science

cryptology and science both are nouns.

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

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

cryptology: the science of analyzing and deciphering codes and ciphers and cryptograms
science: a particular branch of scientific knowledge

Other hypernyms of cryptology include scientific discipline.

cryptology (noun)	science (noun)
the science of analyzing and deciphering codes and ciphers and cryptograms	a particular branch of scientific knowledge
	ability to produce solutions in some problem domain