The synonym of the word ‘Galvanize’ is-

The synonym of the word "Galvanize" in this context is "Excite."

• "Discourage" is actually an antonym of "galvanize." To discourage is to cause someone to lose confidence or enthusiasm.

• "Comfort" is not related to "galvanize." To comfort means to give solace or to ease the grief or distress.

• "Excite" is a synonym for "galvanize" in a metaphorical sense. To galvanize is to stimulate or shock with an electric current, but it's often used metaphorically to mean to excite or energize someone into action.

• "Coat (iron or steel) with a protective layer of copper" is a literal definition of "galvanize" in a technical sense, where it refers to applying a protective zinc coating to steel or iron, but it's not a synonym in the usual sense.

Therefore, "Excite" is the best synonym for "galvanize" among the given options.