Deal can be a noun or a verb.
As a noun: The car salesman gave us a great deal.
As a verb: Please deal the cards.
A speech dealing with a particular subject.
It is not a figure of speech. It is the name for the field of science dealing with flight.
The part of speech for "answer" is a noun.
part of speech
The part of speech for this particular word is a noun.
adverb
what part of speech is work
what part of speech is beneath
Lets take the First Amendment of the US Constitution as an example. The last part of it apples to freedom of speech. The Supreme Court has ruled that the part dealing with freedom of speech means that you can flash your headlights on a car to warn other drivers that there is a speed trap ahead That is an example of judicial interpretation..
The part of speech for "explicit" is an adjective.
The part of speech for "indefinite" is an adjective.
The part of speech for "buried" is a verb.