encryption vs cryptography

encryption and cryptography both are nouns.

Word	Noun	Adjective	Verb	Adverb
encryption	Yes	No	No	No
cryptography	Yes	No	No	No

As nouns, cryptography is a hypernym of encryption; that is, cryptography is a word with a broader meaning than encryption:

Other hypernyms of encryption include coding, secret writing, steganography.

encryption (noun)	cryptography (noun)
the activity of converting data or information into code	act of writing in code or cipher
	the science of analyzing and deciphering codes and ciphers and cryptograms