Noun--however, many words have several possible parts of speech; please submit the Whole Sentence when asking for part of speech--cannot be sure without seeing how it is used in the sentence, as that's what determines the part of speech.
part of speech
Adjective
What part of speech is thaw
The part of speech for oscillate is verb.
An adjective is a part of speech.
His friend's braggadocio apparently hid deeper feelings of inferiority. The braggadocio of the warriors was soon replaced by panicked retreat.
Vain and empty boasting
egotistical arrogant conceited braggadocio
boaster, braggadocio, braggart, egotist, swaggerer, vulgarian
braggadocio, fanfaronade, gasconade, rodomontade
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
The part of speech for "explicit" is an adjective.
The part of speech for "lecturer" is a noun.