The keyword term "11 sep movie" functions grammatically as a noun phrase. The core of this phrase is the noun "movie," which serves as the main point or headword. The preceding element, "11 sep" (an abbreviation for September 11), acts as a noun adjunct or attributive noun, functioning adjectivally to modify and specify the type of movie being referenced. Therefore, the essential part of speech for the main point is a noun.
This classification defines a specific thematic category of films centered on the September 11, 2001 terrorist attacks in the United States. This is not a formal genre but a descriptive label used in film criticism, academic studies, and public discourse to group works that engage with the event. The scope of this category is broad, encompassing various cinematic forms: direct dramatizations that reenact the events of the day (e.g., United 93); fictional narratives exploring the personal and societal aftermath (e.g., Extremely Loud & Incredibly Close); documentaries investigating the attacks and their consequences (e.g., 9/11); and films that analyze the long-term political and psychological impacts, such as the War on Terror or national trauma (e.g., Zero Dark Thirty).
The practical application of this term is to provide immediate thematic and historical context. Labeling a film as an "11 sep movie" allows for the analysis of how cinema has processed, interpreted, and helped shape the cultural memory of a pivotal historical moment. For scholars and critics, this category facilitates comparative studies of narrative strategies, ideological stances, and the evolution of cinematic representations of trauma and national identity in the post-9/11 era.