greatness vs immenseness

greatness and immenseness both are nouns.

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

As nouns, greatness and immenseness are synonyms defined as:

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

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

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