margin Antonyms

intrinsicality nidus nubble nucleolus oculus omphalos pavement penetralia pith polestar radicle restraint rhizome trunnion navel nave keystone lifeblood linchpin loadstone lodestone locus medulla metacenter middle middlemost midriff midship midst umbilicus viscera vitals mecca mesolithic midfield center of gravity centre of gravity HQ hallway center of attention Central Point centre of attention rallying point showpiece central core bowels pillar box waist womb imprisonment