fundamental measure vs fundamental quantity

fundamental measure and fundamental quantity both are nouns.

Word	Noun	Adjective	Verb	Adverb
fundamental measure	Yes	No	No	No
fundamental quantity	Yes	No	No	No

As nouns, fundamental measure and fundamental quantity are synonyms defined as:

fundamental measure and fundamental quantity: one of the four quantities that are the basis of systems of measurement

fundamental measure (noun)	fundamental quantity (noun)
one of the four quantities that are the basis of systems of measurement	one of the four quantities that are the basis of systems of measurement