memory vs recognition

memory and recognition both are nouns.

Word	Noun	Adjective	Verb	Adverb
memory	Yes	No	No	No
recognition	Yes	No	No	No

As nouns, recognition is a hyponym of memory; that is, recognition is a word with a more specific, narrower meaning than memory:

memory (noun)	recognition (noun)
an electronic memory device	designation by the chair granting a person the right to speak in a deliberative body
the power of retaining and recalling past experience	the process of recognizing something or someone by remembering
the cognitive processes whereby past experience is remembered	an acceptance (as of a claim) as true and valid
something that is remembered	coming to understand something clearly and distinctly
the area of cognitive psychology that studies memory processes	approval
	the explicit and formal acknowledgement of a government or of the national independence of a country
	(biology) the ability of one molecule to attach to another molecule that has a complementary shape
	the state or quality of being recognized or acknowledged