The difference between Gusto and Zest

When used as nouns, gusto means enthusiasm, whereas zest means the outer skin of a citrus fruit, used as a flavouring or garnish.

Zest is also verb with the meaning: to scrape the zest from a fruit.

check bellow for the other definitions of Gusto and Zest

Gusto as a noun:

enthusiasm; enjoyment, vigor

Examples:

"He sang with more gusto than talent."

Zest as a noun:

The outer skin of a citrus fruit, used as a flavouring or garnish.

Examples:

"The orange zest gives the strong flavor in this dish."
Zest as a noun:

General vibrance of flavour.

Examples:

"I add zest to the meat by rubbing it with a spice mixture before grilling."
Zest as a noun (by extension):

Enthusiasm; keen enjoyment; relish; gusto.

Examples:

"w Auntie Mame had a real zest for life."
Zest as a noun (rare):

The woody, thick skin enclosing the kernel of a walnut.