reminiscence vs recollection

reminiscence and recollection both are nouns.

Word	Noun	Adjective	Verb	Adverb
reminiscence	Yes	No	No	No
recollection	Yes	No	No	No

As nouns, reminiscence and recollection are synonyms defined as:

reminiscence and recollection: the process of remembering (especially the process of recovering information by mental effort)

Other synonyms of reminiscence include recall.

reminiscence (noun)	recollection (noun)
the process of remembering (especially the process of recovering information by mental effort)	the ability to recall past occurrences
a mental impression retained and recalled from the past	the process of remembering (especially the process of recovering information by mental effort)
	something recalled to the mind