Cheer is a verb (the crowd cheered) and a noun (full of good cheer).
The crowd's response to his speech was a mixture of laughter and cheering.
The word cheering is a verb. It is the present participle of the verb to cheer.
A cheerleader is a person, usually female, who tries to get fans to shout various encouragement to a sports team during the game - this is a person who leads the cheering. "Cheerleader" is a noun, as it is a person.
the crowd was cheering
The part of speech for this particular word is a noun.
part of speech
The part of speech for "answer" is a noun.
adverb
what part of speech is beneath
The part of speech for "unfamiliar" is an adjective.
The part of speech of "came" is a verb.
The part of speech for "twirl" is a verb.