shifter vs stage technician

shifter and stage technician both are nouns.

Word	Noun	Adjective	Verb	Adverb
shifter	Yes	No	No	No
stage technician	Yes	No	No	No

As nouns, stage technician is a hypernym of shifter; that is, stage technician is a word with a broader meaning than shifter:

shifter: a stagehand responsible for moving scenery
stage technician: an employee of a theater who performs work involved in putting on a theatrical production

Other hypernyms of shifter include stagehand.

shifter (noun)	stage technician (noun)
a mechanical device for engaging and disengaging gears	an employee of a theater who performs work involved in putting on a theatrical production
a stagehand responsible for moving scenery