A noun is used as the subject of a sentence or a clause, and as the object of a verb or a preposition.
Examples:
The part I liked best was the dancing. (subject of the sentence)
The exposure that the part gave herwas the launch of her career. (subject of the clause)
I cut off the part that was burnt. (direct object of the verb)
He bought a new car with part of his inheritance. (object of the preposition)
The part of speech depends on the use of the word in context. If the use is "Port wine", the word is used to describe the noun "wine" and therefore is an adjective. If the word is used as a noun e.g., "...a glass of Port", it is a noun.
The word "guile" is a noun. It refers to the use of cunning or deceit in behavior.
It depends on how you use the word. "He travels to Asia." (Verb) "He spoke of his travels." (Noun)
The part of speech for the word diplomacy is a noun.
The use of the word in the sentence derminates the part of speech
Extensive is an adjective, and use is a noun.
A noun, specifically a proper noun.
Noun is a noun.
"October" is a noun.
The word "tradition" is a noun.
The word "synthesis" is a noun.
The word "lake" is a noun.