enormousness vs greatness

enormousness and greatness both are nouns.

Word	Noun	Adjective	Verb	Adverb
enormousness	Yes	No	No	No
greatness	Yes	No	No	No

As nouns, enormousness and greatness are synonyms defined as:

enormousness and greatness: unusual largeness in size or extent or number

Other synonyms of enormousness include grandness, immenseness, immensity, sizeableness, vastness, wideness.

enormousness (noun)	greatness (noun)
unusual largeness in size or extent or number	the property possessed by something or someone of outstanding importance or eminence
	unusual largeness in size or extent or number