Example:
/(OR)|(or)$|([Oo]regon)$/gm
Matches: Eugene, OR eugene, or Somewhere, oregon Portland, Oregon portland, or eugene, oregon fksjbf, oregon fsjdnfksd oregon
Example:
/(OR)|(or)$|([Oo]regon)$/gm
Matches: Eugene, OR eugene, or Somewhere, oregon Portland, Oregon portland, or eugene, oregon fksjbf, oregon fsjdnfksd oregon