The keyword phrase "patriot day trailer" functions grammatically as a noun phrase. The core part of speech, which serves as the main point or head of the phrase, is the noun "trailer."
In this construction, "trailer" is the head noun, identifying the specific type of object being discussed. The preceding words, "Patriot Day," act as a compound adjectival modifier. "Patriot Day," treated here as a proper noun (the title of a film), functions as a noun adjunct. This is a grammatical structure where a noun modifies another noun to specify its type or purpose, similar to phrases like "computer screen" or "film review." The modifier "Patriot Day" specifies which trailer is being referenced.
For the purpose of an article, treating the keyword term as a noun is the correct analytical approach. This classification establishes that the phrase refers to a specific entity (a promotional video) and dictates its grammatical function. As a noun phrase, it can properly serve as the subject, object, or complement within a sentence, which is a crucial consideration for constructing coherent and grammatically correct content.
