lab coat vs laboratory coat

lab coat and laboratory coat both are nouns.

Word	Noun	Adjective	Verb	Adverb
lab coat	Yes	No	No	No
laboratory coat	Yes	No	No	No

As nouns, lab coat and laboratory coat are synonyms defined as:

lab coat and laboratory coat: a light coat worn to protect clothing from substances used while working in a laboratory

lab coat (noun)	laboratory coat (noun)
a light coat worn to protect clothing from substances used while working in a laboratory	a light coat worn to protect clothing from substances used while working in a laboratory