specialness vs specialty

specialness and specialty both are nouns.

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

As nouns, specialness and specialty are synonyms defined as:

Other synonyms of specialness include distinctiveness, peculiarity, speciality.

specialness (noun)	specialty (noun)
a distinguishing trait	the special line of work you have adopted as your career
the quality of being particular and pertaining to a specific case or instance	a distinguishing trait
	an asset of special worth or utility