The word speech is a noun, a common noun; a word for the communication or expression of thoughts in spoken words; something spoken, oration; a person's style of speaking; a word for a thing.
The noun 'speech' is an uncountable, abstract noun as a word for the ability to speak.
The noun 'speech' is a countable, concrete noun as a word for an oration, words spoken to group of listeners.
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.
The part of speech for "buried" is a verb.