The keyword term functions grammatically as a compound noun phrase. In this structure, the word "movie" is the head noun, which is the core subject. The preceding proper nouns, "Patriots Day" and "Boston Marathon," act as adjectival modifiers, specifying the exact film being discussed. The entire phrase operates as a single unit to name a specific entity.
A detailed grammatical analysis shows a hierarchy of modification. The primary noun is "movie." This noun is modified by the proper noun "Boston Marathon," which functions as a noun adjunct (or attributive noun) to classify the movie by its subject. The entire unit "Boston Marathon movie" is then further modified by the proper noun "Patriots Day," which serves as the film's specific title. This stacking of noun adjuncts is a common English construction used to create a highly precise and descriptive nominal group.
Understanding this term as a noun phrase is crucial for its practical application in writing. It dictates that the phrase can serve as the subject of a sentence, a direct object, or the object of a preposition, ensuring correct syntax. For the purpose of an article, treating the entire phrase as a singular conceptual unit is essential for both clarity and search engine optimization, as it represents a specific topic or entity that an audience is searching for.
