Find the Synonyms: Basic and Fundamental Words

basal, bedrock, cardinal, circuit, code, creed, didactic, elementary, essence, essential, ethos, footing, foundation, foundational, fundamental, fundamentalist, genuine, inalienable, intact, orthodox, primal, primitive, rudiment, rudimental, rudimentary, simple, standard, stark, subsistence, system, tenet, touchstone, underlying, underpinning, undeveloped