Synonyms of keystone in English:

keystone


See US English definition of keystone

See UK English definition of Keystone

See Spanish definition of dovela

noun

1‘a carved head formed the keystone of the door’

SYNONYMS
cornerstone, central stone, quoin

2‘cooperation remains the keystone of the government's security policy’

SYNONYMS
foundation, basis, linchpin, cornerstone, base, principle, guiding principle, core, heart, centre, crux, fundament, mainspring, priority