fundamental law vs organic law

fundamental law and organic law both are nouns.

Word	Noun	Adjective	Verb	Adverb
fundamental law	Yes	No	No	No
organic law	Yes	No	No	No

As nouns, fundamental law and organic law are synonyms defined as:

fundamental law and organic law: law determining the fundamental political principles of a government

Other synonyms of fundamental law include constitution.

fundamental law (noun)	organic law (noun)
law determining the fundamental political principles of a government	law determining the fundamental political principles of a government