nuclear

basic essential fundamental important key paramount pivotal significant

cardinal center chief dominant interior intermediate leading master mean median middle midway primary prime radical ruling salient umbilical

axial centric centroidal equidistant focal foremost inmost inner mid middlemost midmost omphalic outstanding overriding predominant

additional auxiliary extra inessential insignificant minor nonessential secondary trivial unimportant unsubstantial

exterior extreme inferior outer outside subordinate

peripheral

close constitutional essential familiar focal inherent innermore inside interior internal intestinal intimate intrinsic inward

exterior external outer outside physical

biological

anatomical constitutional essential fundamental integral living necessary original primary prime primitive principal

amoebic animate basal biotic cellular elemental inherent innate live plasmic structural vital

accessory auxiliary extra inessential minor secondary trivial unimportant unnecessary

inorganic man-made unnatural