The difference between Authentic and Phony

When used as adjectives, authentic means of the same origin as claimed, whereas phony means fraudulent.

Phony is also noun with the meaning: a person who assumes an identity or quality other than their own.

check bellow for the other definitions of Authentic and Phony

Authentic as an adjective:

Of the same origin as claimed; genuine.

Examples:

"The experts confirmed it was an authentic signature."
Authentic as an adjective:

Conforming to reality and therefore worthy of trust, reliance, or belief.

Examples:

"The report was completely authentic."

"an authentic writer; an authentic portrait; authentic information"
Authentic as an adjective (music, of a [[Gregorian mode]]):

Having the final as the lowest note of the mode.
Authentic as an adjective (obsolete):

authoritative

Phony as an adjective:

Fraudulent; fake; having a misleading appearance.

Examples:

"A good jeweler should be able to tell a real stone from a phony one."

Phony as a noun:

A person who assumes an identity or quality other than their own.

Examples:

"He claims to be a doctor, but he's nothing but a fast-talking phony."
Phony as a noun:

A person who professes beliefs or opinions that they do not hold.

Examples:

"He's such a phony, he doesn't believe half of what he says."