majesty vs impressiveness

majesty and impressiveness both are nouns.

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

As nouns, impressiveness is a hypernym of majesty; that is, impressiveness is a word with a broader meaning than majesty:

Other hypernyms of majesty include grandness, magnificence, richness.

majesty (noun)	impressiveness (noun)
impressiveness in scale or proportion	splendid or imposing in size or appearance
	the quality of making a strong or vivid impression on the mind