laboratory vs lab

laboratory and lab both are nouns.

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

As nouns, laboratory and lab are synonyms defined as:

Other synonyms of laboratory include research lab, research laboratory, science lab, science laboratory.

laboratory (noun)	lab (noun)
a workplace for the conduct of scientific research	a workplace for the conduct of scientific research
a region resembling a laboratory inasmuch as it offers opportunities for observation and practice and experimentation