backbone vs mainstay

mainstay vs backbone

backbone and mainstay both are nouns.

Word	Noun	Adjective	Verb	Adverb
backbone	Yes	No	No	No
mainstay	Yes	No	No	No

As nouns, backbone and mainstay are synonyms defined as:

backbone and mainstay: a central cohesive source of support and stability

Other synonyms of backbone include anchor, keystone, linchpin, lynchpin.

backbone (noun)	mainstay (noun)
the part of a network that connects other networks together	the forestay that braces the mainmast
the part of a book's cover that encloses the inner side of the book's pages and that faces outward when the book is shelved	a central cohesive source of support and stability
fortitude and determination	a prominent supporter
the series of vertebrae forming the axis of the skeleton and protecting the spinal cord
a central cohesive source of support and stability

Difference between backbone and mainstay

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