magnificence vs impressiveness

magnificence and impressiveness both are nouns.

Word	Noun	Adjective	Verb	Adverb
magnificence	Yes	No	No	No
impressiveness	Yes	No	No	No

As nouns, magnificence and impressiveness are synonyms defined as:

magnificence and impressiveness: splendid or imposing in size or appearance

Other synonyms of magnificence include grandness, richness.

magnificence (noun)	impressiveness (noun)
the quality of being magnificent or splendid or grand	splendid or imposing in size or appearance
splendid or imposing in size or appearance	the quality of making a strong or vivid impression on the mind