keystone Synonyms
Another word for keystone
• noun (Context 1)
The fundamental principle, element, or core component on which an entire system, policy, or process depends.
"Freedom of speech remains the absolute linchpin of any functioning democratic society."
• noun (Context 2)
A biological species or ecological entity that exerts a disproportionately large impact on its surrounding environment, crucial for maintaining the structure of an ecological community.
"As an apex predator, the sea otter acts as a anchor by keeping the sea urchin population in check and protecting the kelp forests."
• noun (Context 3)
The central, wedge-shaped stone at the apex of a masonry arch or vault that locks all the other stones into position.
"The master mason carefully lowered the capstone into place, ensuring the magnificent stone arch could finally support its own weight."