The keyword term is a noun phrase, with the principal part of speech being the head noun "description." In this construction, the proper noun "Patriot Day" functions as a noun adjunct, modifying "description" by specifying its subject matter.
A grammatical analysis identifies "description" as the core element that determines the phrase's function. The words "Patriot Day" act adjectivally to classify the type of description. This structure, [Modifier Noun] + [Head Noun], is a common English formation used to create a specific, compound concept. The relationship is not possessive but categorical; it designates a description about Patriot Day, rather than one belonging to it.
This grammatical determination is critical for content strategy. Because the main point is the noun "description," the article's primary purpose must be to define, characterize, and elaborate on the topic of Patriot Day. The focus should be expository, providing a detailed account of the day's origin, meaning, and observances, thereby fulfilling the expectation set by the keyword itself.
