hand brake vs parking brake

hand brake and parking brake both are nouns.

Word	Noun	Adjective	Verb	Adverb
hand brake	Yes	No	No	No
parking brake	Yes	No	No	No

As nouns, hand brake and parking brake are synonyms defined as:

hand brake and parking brake: a brake operated by hand; usually operates by mechanical linkage

Other synonyms of hand brake include emergency, emergency brake.

hand brake (noun)	parking brake (noun)
a brake operated by hand; usually operates by mechanical linkage	a brake operated by hand; usually operates by mechanical linkage