basic principle vs bedrock

basic principle and bedrock both are nouns.

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

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

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

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

basic 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