driving licence vs driver's license

driving licence and driver's license both are nouns.

Word	Noun	Adjective	Verb	Adverb
driving licence	Yes	No	No	No
driver's license	Yes	No	No	No

As nouns, driving licence and driver's license are synonyms defined as:

driving licence and driver's license: a license authorizing the bearer to drive a motor vehicle

Other synonyms of driving licence include driver's licence, driving license.

driving licence (noun)	driver's license (noun)
a license authorizing the bearer to drive a motor vehicle	a license authorizing the bearer to drive a motor vehicle