spoken communication vs oral communication

spoken communication and oral communication both are nouns.

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

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

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

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

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