natural language processing vs NLP

natural language processing and NLP both are nouns.

Word	Noun	Adjective	Verb	Adverb
natural language processing	Yes	No	No	No
NLP	Yes	No	No	No

As nouns, natural language processing and NLP are synonyms defined as:

natural language processing and NLP: the branch of information science that deals with natural language information

Other synonyms of natural language processing include human language technology.

natural language processing (noun)	NLP (noun)
the branch of information science that deals with natural language information	the branch of information science that deals with natural language information