fundamental quantity vs fundamental measure

fundamental quantity and fundamental measure both are nouns.

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

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

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

fundamental quantity (noun)	fundamental measure (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