oral communication vs language

oral communication and language both are nouns.

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

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

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

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

oral communication (noun)	language (noun)
(language) communication by word of mouth	the mental faculty or power of vocal communication
	the cognitive processes involved in producing and understanding linguistic communication
	a systematic means of communicating by the use of sounds or conventional symbols
	(language) communication by word of mouth
	the text of a popular song or musical-comedy number
	a system of words used to name things in a particular discipline