speech vs reproof

speech and reproof both are nouns.

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

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

Other hypernyms of speech include rebuke, reprehension, reprimand, reproval.

speech (noun)	reproof (noun)
the mental faculty or power of vocal communication	an act or expression of criticism and censure
(language) communication by word of mouth
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

speech (verb)	reproof (verb)
	take to task