* Noun: If "swimmers" refers to people who swim, it's a noun.
* Example: "The swimmers practiced their strokes in the pool."
* Adjective: If "swimmers" describes something related to swimming, it's an adjective.
* Example: "They wore swimmers (swimsuits) to the beach."
* Verb (present participle): If "swimmers" is part of a verb phrase like "are swimming," it's a verb.
* Example: "The dolphins are swimmers near the shore."
Let me know if you have a specific sentence in mind, and I can help you determine the part of speech!