Synonyms of basic

1 Syllable

main, stock, nub, key, gut, chief, first, raw, keyer

2 Syllables

simplex, virtual, easy, bottom, guter, rawest, bottoms, rooter, stocker, easiest, central, rough-hewn, unfried, centric, smallest, proemial, headmost, basal, tester, littlest, standard, vital, axial, roughhewn, rawer, easier

3 Syllables

inherent, centroidal, lowermost, gravamen, germinal, underlying, incipient, integrant, primordial, initial, cardinal, constituent, minimal, life-or-death, untreated, unbaked, ungraded, principal, capitals, component, essential, tectonic, primary, intrinsic, bottom-line, doctrine, radical, element, capital, substratal, nethermost, structural, undermost

4 Syllables

prelusive, elemental, inceptive, precursory, bottomline, rough-and-ready, wild-and-woolly, coal-and-ice, name-of-the-game, minimalist, rudimental, primitive, necessary, unadorned, unevolved, inductive, unfashioned, anatomic, constructural, formational

5 Syllables

exploratory, inalienable, preliminary, nonnegotiable, nontransferable, untransferable, unexperienced, initiatory, unpasteurized, preparative, pre-requisite, indispensable, introductory, uncomplicated, constitutive