speech communication vs oral communication

speech communication and oral communication both are nouns.

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

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

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

Other synonyms of speech communication include language, speech, spoken communication, spoken language, voice communication.

speech communication (noun)	oral communication (noun)
(language) communication by word of mouth	(language) communication by word of mouth