majestic vs imperial

majestic is not a noun while imperial is a noun.

Word	Noun	Adjective	Verb	Adverb
majestic	No	Yes	No	No
imperial	Yes	Yes	No	No

As adjectives, majestic and imperial are synonyms defined as:

Other synonyms of majestic include purple, regal, royal.

majestic (noun)	imperial (noun)
	a piece of luggage carried on top of a coach
	a small tufted beard worn by Emperor Napoleon III

majestic (adjective)	imperial (adjective)
having or displaying great dignity or nobility	befitting or belonging to an emperor or empress
belonging to or befitting a supreme ruler	relating to or associated with an empire
majestic in manner or bearing; superior to mundane matters	of or belonging to the British Imperial System of weights and measures
	belonging to or befitting a supreme ruler