bedrock vs basic principle

bedrock and basic principle both are nouns.

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

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

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

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

bedrock (noun)	basic 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