enormousness vs sizeableness

enormousness and sizeableness both are nouns.

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

As nouns, enormousness and sizeableness are synonyms defined as:

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

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

enormousness (noun)	sizeableness (noun)
unusual largeness in size or extent or number	unusual largeness in size or extent or number