peripherals Antonyms

mains nucleolus nucleus omphalos pith pivot point quintessence root nubble nub meat medulla metacenter middle midship nave navel nidus substance topic umbilicus bench mark pillar box mecca center of gravity centre of gravity HQ nuts and bolts rallying point bellybutton nitty-gritty vertebra bedrock fundamentals meeting place cornerstone nerve center nerve centre infielder showpiece magnet asymptote core crux distillate distillation emphasis equidistance essence