monthsary vs day of remembrance

monthsary and day of remembrance both are nouns.

Word	Noun	Adjective	Verb	Adverb
monthsary	Yes	No	No	No
day of remembrance	Yes	No	No	No

As nouns, day of remembrance is a hypernym of monthsary; that is, day of remembrance is a word with a broader meaning than monthsary:

monthsary: the one month anniversary of something
day of remembrance: the date on which an event occurred in some previous year (or the celebration of it)

Other hypernyms of monthsary include anniversary.

monthsary (noun)	day of remembrance (noun)
the one month anniversary of something	the date on which an event occurred in some previous year (or the celebration of it)