fundamental principle vs bedrock

fundamental principle and bedrock both are nouns.

Word	Noun	Adjective	Verb	Adverb
fundamental principle	Yes	No	No	No
bedrock	Yes	No	No	No

As nouns, fundamental principle and bedrock are synonyms defined as:

fundamental principle and bedrock: principles from which other truths can be derived

Other synonyms of fundamental principle include basic principle, basics, fundamentals.

fundamental principle (noun)	bedrock (noun)
principles from which other truths can be derived	principles from which other truths can be derived
	solid unweathered rock lying beneath surface deposits of soil