National Climatic Data Center vs NCDC

National Climatic Data Center and NCDC both are nouns.

Word	Noun	Adjective	Verb	Adverb
National Climatic Data Center	Yes	No	No	No
NCDC	Yes	No	No	No

As nouns, National Climatic Data Center and NCDC are synonyms defined as:

National Climatic Data Center and NCDC: the part of NOAA that maintains the world's largest active archive of weather data

National Climatic Data Center (noun)	NCDC (noun)
the part of NOAA that maintains the world's largest active archive of weather data	the part of NOAA that maintains the world's largest active archive of weather data