speech vs speech communication

speech and speech communication both are nouns.

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

As nouns, speech and speech communication are synonyms defined as:

speech and speech communication: (language) communication by word of mouth

speech (noun)	speech communication (noun)
the mental faculty or power of vocal communication	(language) communication by word of mouth
(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