The word airplanes is a noun. It is the plural of airplane.
We can find airplanes in the airport
airplanes
the engine
part of speech
The part of speech for this particular word is a noun.
The part of speech for "answer" is a noun.
adverb
what part of speech is beneath
Well, there are some airplanes which can be outrun by helicopters, but, for the most part, airplanes are faster.
The part of speech for "explicit" is an adjective.
The part of speech for "twirl" is a verb.
The part of speech for "unfamiliar" is an adjective.