special vs specialness

special and specialness both are nouns.

Word	Noun	Adjective	Verb	Adverb
special	Yes	Yes	No	No
specialness	Yes	No	No	No

special (noun)	specialness (noun)
a special offering (usually temporary and at a reduced price) that is featured in advertising	a distinguishing trait
a television production that features a particular person or work or topic	the quality of being particular and pertaining to a specific case or instance
a dish or meal given prominence in e.g. a restaurant

special (adjective)	specialness (adjective)
for a special service or occasion
first and most important
adapted to or reserved for a particular purpose
having a specific function or scope
surpassing what is common or usual or expected
added to a regular schedule
unique or specific to a person or thing or category