A pronoun can be substituted for a noun and can perform all of the functions of a noun.
The part of speech for "answer" is a noun.
The part of speech for "archaeologist" is a noun.
Permission is a noun.
Touchdown is a noun.
A pronoun is a word that substitutes for a noun.
The part of speech for the word diplomacy is a noun.
A noun, specifically a proper noun.
The word speech is a noun.
The word "makeshift" can function as both a noun and an adjective. As a noun, it refers to something used as a temporary substitute. As an adjective, it describes something that is improvised or temporary.
There is only one part of speech in a noun--noun.
Noun
The part of speech for "lecturer" is a noun.