Golden State vs CA

Golden State and CA both are nouns.

Word	Noun	Adjective	Verb	Adverb
Golden State	Yes	No	No	No
CA	Yes	No	No	No

As nouns, Golden State and CA are synonyms defined as:

Golden State and CA: a state in the western United States on the Pacific; the 3rd largest state; known for earthquakes

Other synonyms of Golden State include Calif., California.

Golden State (noun)	CA (noun)
a state in the western United States on the Pacific; the 3rd largest state; known for earthquakes	a state in the western United States on the Pacific; the 3rd largest state; known for earthquakes