Overcome is a verb.
Exponential is an adjective.
Allegory is a noun.
A verb, more particularly a "linking verb."
The word alarm is a verb. It can also be a noun as in a sound to alert you to something.
The word foil is a noun. It can also be a verb meaning to prevent someone from accomplishing something.
The word awestruck is an adjective. It means to be overcome with awe.
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
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.
The part of speech of "came" is a verb.
The part of speech for "lecturer" is a noun.
The part of speech for "indefinite" is an adjective.