driving licence vs driver's licence

driving licence and driver's licence both are nouns.

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

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

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

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

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