adscript vs superscript

adscript is not a noun while superscript is a noun.

Word	Noun	Adjective	Verb	Adverb
adscript	No	Yes	No	No
superscript	Yes	Yes	No	No

adscript (noun)	superscript (noun)
	a character or symbol set or printed or written above and immediately to one side of another character

adscript (adjective)	superscript (adjective)
written or printed immediately following another character and aligned with it	written or printed above and to one side of another character
(used of persons) bound to a tract of land; hence their service is transferable from owner to owner