The difference between Courteous and Courtesy

When used as adjectives, courteous means showing regard or thought for others, whereas courtesy means given or done as a polite gesture.

Courtesy is also noun with the meaning: polite behavior.

check bellow for the other definitions of Courteous and Courtesy

Courteous as an adjective:

Showing regard or thought for others; especially, displaying good manners or etiquette.

Examples:

"a courteous gentleman"

"a courteous gesture"

Courtesy as a noun (uncountable):

Polite behavior.

Examples:

"Please extend them the courtesy of your presence."
Courtesy as a noun (countable):

A polite gesture or remark.

Examples:

"I offered them a ride simply as a courtesy."
Courtesy as a noun (uncountable):

Consent or agreement in spite of fact; indulgence.

Examples:

"They call this pond a lake by courtesy only."
Courtesy as a noun (uncountable):

Willingness or generosity in providing something needed.

Examples:

"They received free advertising through the courtesy of the local newspaper."
Courtesy as a noun:

A curtsey.
Courtesy as a noun (legal):

The life interest that the surviving husband has in the real or heritable estate of his wife.

Courtesy as an adjective:

Given or done as a polite gesture.

Examples:

"We paid a courtesy visit to the new neighbors."
Courtesy as an adjective:

Supplied free of charge.

Examples:

"synonyms complimentary free of charge gratis"

"The event planners offered courtesy tickets for the reporters."