majesty vs magnificence

majesty and magnificence both are nouns.

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

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

Other hypernyms of majesty include grandness, impressiveness, richness.

majesty (noun)	magnificence (noun)
impressiveness in scale or proportion	the quality of being magnificent or splendid or grand
	splendid or imposing in size or appearance