It is an adjective.
Nice is an adjective.
The word "nice" can be used as an adjective.
The word "nice" can be both an adjective and a noun.
Nicest is an adjective. It's the superlative form of nice.
Escort can be used as a verb and a noun. Verb: Will you escort me to the party? Noun: Will you be my escort?
The part of speech for this particular word is a noun.
part of speech
The part of speech for "answer" is a noun.
what part of speech is beneath
adverb
Change can be a verb and a noun.As a verb: I change my mind a lot.As a noun: It's nice to break the monotony with some change.
The part of speech for "explicit" is an adjective.