What is another word for mainstay?
Pronunciation: [mˈe͡ɪnste͡ɪ] (IPA) 
Mainstay, a noun that refers to a person or thing that provides essential support. There are numerous synonyms for the word mainstay such as cornerstone, bulwark, foundation, backbone, and keystone. The word cornerstone usually implies something that is the fundamental basis on which something is built or developed. On the other hand, bulwark is used to describe something that provides defense and protection. Foundation is similar to cornerstone, but it also indicates the stability and strength of something. Additionally, backbone emphasizes the toughness and resilience of something. Finally, keystone implies the importance and vitalness of something, as it is the central point around which everything else revolves.
