plural of distinction without a difference

(education) The distinction drawn by some language teachers between an "error" (a mistaken belief that a given usage or construction is correct; or, an incorrect use resulting from such a belief) and "a mistake" (an accidental use of a usage or construction despite knowing that it is incorrect).

(sociolinguistics) The distinction between a formal and an informal second-person pronoun in some languages.

plural of distinction without a difference

In a distinct manner.

(archaic) distinctness

plural of distinctor

That which makes or marks a distinction.

superlative form of distinct: most distinct

Without distinction.