repulsor vs device

repulsor and device both are nouns.

Word	Noun	Adjective	Verb	Adverb
repulsor	Yes	No	No	No
device	Yes	No	No	No

As nouns, device is a hypernym of repulsor; that is, device is a word with a broader meaning than repulsor:

repulsor (noun)	device (noun)
a fictional anti-gravity device in the Star Wars Universe.	any clever maneuver
A repulsor is either one of two drives located in the gauntlets of Iron Man's armor; they have been referred to as being magnetic, a blast of charged particles, and as a force beam.	an instrumentality invented for a particular purpose
	an emblematic design (especially in heraldry)
	any ornamental pattern or design (as in embroidery)
	something in an artistic work designed to achieve a particular effect