automatic drive vs automatic transmission

automatic drive and automatic transmission both are nouns.

Word	Noun	Adjective	Verb	Adverb
automatic drive	Yes	No	No	No
automatic transmission	Yes	No	No	No

As nouns, automatic drive and automatic transmission are synonyms defined as:

automatic drive and automatic transmission: a transmission that automatically changes the gears according to the speed of the car

automatic drive (noun)	automatic transmission (noun)
a transmission that automatically changes the gears according to the speed of the car	a transmission that automatically changes the gears according to the speed of the car