impressiveness vs magnificence

impressiveness and magnificence both are nouns.

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

As nouns, impressiveness and magnificence are synonyms defined as:

impressiveness and magnificence: splendid or imposing in size or appearance

Other synonyms of impressiveness include grandness, richness.

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