immenseness vs greatness

immenseness and greatness both are nouns.

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

As nouns, immenseness and greatness are synonyms defined as:

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

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

immenseness (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