oral communication vs spoken communication

oral communication and spoken communication both are nouns.

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

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

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

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

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