unexpectedness vs surprisingness

unexpectedness and surprisingness both are nouns.

Word	Noun	Adjective	Verb	Adverb
unexpectedness	Yes	No	No	No
surprisingness	Yes	No	No	No

As nouns, unexpectedness and surprisingness are synonyms defined as:

unexpectedness and surprisingness: extraordinariness by virtue of being unexpected

unexpectedness (noun)	surprisingness (noun)
extraordinariness by virtue of being unexpected	extraordinariness by virtue of being unexpected