bedrock vs fundamental principle

bedrock and fundamental principle both are nouns.

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

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

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

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

bedrock (noun)	fundamental principle (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