The keyword term "911 wiki" functions grammatically as a compound noun. In this structure, the main point or head of the phrase is the noun "wiki," which is modified by "911."
The term "911" acts as a noun adjunct (or attributive noun), which is a noun that modifies another noun and functions like an adjective. It specifies the type or subject of the "wiki," distinguishing it from other wikis (e.g., a "gaming wiki" or a "science wiki"). The word "911," a proper noun referring to the September 11 attacks, provides the specific context for the collaborative website ("wiki"). Therefore, the entire phrase refers to a single entity: a wiki dedicated to the topic of 9/11.
Identifying the term as a noun is crucial because it determines its function within a sentence. As a noun, "911 wiki" can act as a subject, a direct object, or an object of a preposition. This classification establishes that the article's focus is on a specific informational resource (the wiki) rather than solely on the event (911) it documents.
