Synonyms:
mainstay
Meaning: the forestay that braces the mainmast
Synonyms:
anchor, mainstay, keystone, backbone, linchpin, lynchpin
Meaning: a central cohesive source of support and stability; "faith is his anchor"; "the keystone of campaign reform was the ban on soft money"; "he is the linchpin of this firm"
Synonyms:
pillar, mainstay
Meaning: a prominent supporter; "he is a pillar of the community"
Usage examples
Lucy was his mainstay at home, he told Katy. Her mother had been "weakly" now this long time back, and Bess and Nanny were but children yet, so Lucy had to take command and keep things ship-shape when he was away.