imperialness vs richness

imperialness and richness both are nouns.

Word	Noun	Adjective	Verb	Adverb
imperialness	Yes	No	No	No
richness	Yes	No	No	No

As nouns, richness is a hypernym of imperialness; that is, richness is a word with a broader meaning than imperialness:

imperialness: The quality of being related to an empire, emperor, or empress.
richness: splendid or imposing in size or appearance

Other hypernyms of imperialness include grandness, impressiveness, magnificence.

imperialness (noun)	richness (noun)
The quality of being related to an empire, emperor, or empress.	a strong deep vividness of hue
	the property of a sensation that is rich and pleasing
	the property of producing abundantly and sustaining vigorous and luxuriant growth
	the property of being extremely abundant
	splendid or imposing in size or appearance
	the quality of having high intrinsic value
	abundant wealth