remember vs retrospect

remember is not a noun while retrospect is a noun.

Word	Noun	Adjective	Verb	Adverb
remember	No	No	Yes	No
retrospect	Yes	No	Yes	No

As verbs, retrospect is a hyponym of remember; that is, retrospect is a word with a more specific, narrower meaning than remember:

Other hyponyms of remember include reminisce, look back, review.

remember (noun)	retrospect (noun)
	contemplation of things past

remember (verb)	retrospect (verb)
recall knowledge from memory; have a recollection	look back upon (a period of time, sequence of events); remember
keep in mind for attention or consideration
recapture the past; indulge in memories
exercise, or have the power of, memory
call to remembrance; keep alive the memory of someone or something, as in a ceremony
mention as by way of greeting or to indicate friendship
mention favorably, as in prayer
show appreciation to