peripherals Antonyms

showpiece root quintessence point pivot pith nucleus nucleolus nubble nub nidus navel nave middle umbilicus vertebra rallying point nuts and bolts HQ centre of gravity bench mark bellybutton nitty-gritty infielder nerve centre cornerstone meeting place fundamentals bedrock metacenter medulla fulcrum foundation fiber equidistance distillation crux core centrum centrepiece centerpiece basis backbone axis gist gravamen mains lodestone loadstone linchpin