richness vs loftiness

richness and loftiness both are nouns.

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

As nouns, loftiness is a hyponym of richness; that is, loftiness is a word with a more specific, narrower meaning than richness:

Other hyponyms of richness include expansiveness, expansivity, majesty, stateliness, imperialness.

richness (noun)	loftiness (noun)
a strong deep vividness of hue	the quality of being high or lofty
the property of a sensation that is rich and pleasing	impressiveness in scale or proportion
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