lab vs science lab

lab and science lab both are nouns.

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

As nouns, lab and science lab are synonyms defined as:

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

lab (noun)	science lab (noun)
a workplace for the conduct of scientific research	a workplace for the conduct of scientific research