Difference between Pillar and Mainstay

What is the difference between Pillar and Mainstay?

Pillar as a noun is a large post, often used as supporting architecture. while Mainstay as a noun is a chief support.

Part of speech: noun

Definition: A large post, often used as supporting architecture.

Example sentence: My parents, especially my mother, has been my pillar of strength.

Part of speech: noun

Definition: A chief support.A stabilising rope from the top of the mainmast to the bottom of the foremast.

We hope you now know whether to use Pillar or Mainstay in your sentence.