The difference between Barker and Spruiker

When used as nouns, barker means someone or something who barks, whereas spruiker means one who spruiks business, a tout.

check bellow for the other definitions of Barker and Spruiker

Barker as a noun:

Someone or something who barks.

Examples:

"My neighbor's dog is a constant barker that keeps me awake at night."
Barker as a noun:

A person employed to solicit customers by calling out to passersby, e.g. at a carnival.

Examples:

"Bob had amassed a considerable stockpile of double entendres from his days working as a barker for a strip joint."
Barker as a noun:

A shelf-talker.
Barker as a noun (video games):

A video game mode where the action is demonstrated to entice someone to play the game.

Examples:

"The barker mode of the arcade video game convinced the teenager to spend a quarter."
Barker as a noun (slang, dated):

A pistol.

Examples:

"rfquotek Charles Dickens"
Barker as a noun:

The spotted redshank.

Barker as a noun (historical):

A person who removes needed or valuable tree bark, as on a cinnamon or cinchona plantation.

Examples:

"The professor of barker has been made largely obsolete by the realization that in most cases saplings can be cultivated far more profitably."
Barker as a noun (obsolete):

A tanner.

Examples:

"The profession of barker has been made largely obsolete by the introduction of more effective tanning agents, but it lives on as a surname."
Barker as a noun:

A machine used to remove unneeded bark from wood.

Examples:

"Run these logs through the barker so we can use them as fence posts."