speech vs faculty

speech and faculty both are nouns.

Word	Noun	Adjective	Verb	Adverb
speech	Yes	No	No	No
faculty	Yes	No	No	No

As nouns, faculty is a hypernym of speech; that is, faculty is a word with a broader meaning than speech:

Other hypernyms of speech include mental faculty, module.

speech (noun)	faculty (noun)
the mental faculty or power of vocal communication	one of the inherent cognitive or perceptual powers of the mind
(language) communication by word of mouth	the body of teachers and administrators at a school
the act of delivering a formal spoken communication to an audience
words making up the dialogue of a play
a lengthy rebuke
the exchange of spoken words
your characteristic style or manner of expressing yourself orally
something spoken