What part of speech is the word escort?

The word "escort" can be a few different parts of speech, depending on how it's used:

* Noun: A person who accompanies another for protection or as a guide. (e.g. "The diplomat had a police escort.")

* Verb: To accompany someone as a guide or protector. (e.g. "The soldiers escorted the prisoners to the courthouse.")

* Adjective: (Less common) Describing something that is used for escorting. (e.g. "an escort vehicle")

So, without context, it's impossible to say definitively which part of speech "escort" is. You need to look at how it's used in the sentence.