shifter vs gear lever

shifter and gear lever both are nouns.

Word	Noun	Adjective	Verb	Adverb
shifter	Yes	No	No	No
gear lever	Yes	No	No	No

As nouns, shifter and gear lever are synonyms defined as:

shifter and gear lever: a mechanical device for engaging and disengaging gears

Other synonyms of shifter include gearshift, gearstick.

shifter (noun)	gear lever (noun)
a mechanical device for engaging and disengaging gears	a mechanical device for engaging and disengaging gears
a stagehand responsible for moving scenery