mainstay vs backbone

backbone vs mainstay

mainstay and backbone both are nouns.

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

As nouns, mainstay and backbone are synonyms defined as:

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

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

mainstay (noun)	backbone (noun)
the forestay that braces the mainmast	the part of a network that connects other networks together
a central cohesive source of support and stability	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 prominent supporter	fortitude and determination
	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 mainstay and backbone

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