memory vs remembrance

memory and remembrance both are nouns.

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

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

Other hyponyms of memory include anamnesis, recollection.

memory (noun)	remembrance (noun)
an electronic memory device	the ability to recall past occurrences
the power of retaining and recalling past experience	a recognition of meritorious service
the cognitive processes whereby past experience is remembered
something that is remembered
the area of cognitive psychology that studies memory processes