Wiktionary
attributive noun
n. 1 (context grammar English) A noun that modifies another noun attributively and that is optional (that is, it can be removed without affecting the grammar of the sentence); a noun used as an adjective. 2 (context grammar when referring to a language other than English English) A noun denoting bearer of a quality or an attribute of a subject, in reference to the lexical morpheme from which it is derived.