runner vs device

runner and device both are nouns.

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

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

runner (noun)	device (noun)
fish of western Atlantic: Cape Cod to Brazil	any clever maneuver
device consisting of the parts on which something can slide along	an instrumentality invented for a particular purpose
a long narrow carpet	an emblematic design (especially in heraldry)
a trained athlete who competes in foot races	any ornamental pattern or design (as in embroidery)
someone who imports or exports without paying duties	something in an artistic work designed to achieve a particular effect
a baseball player on the team at bat who is on base (or attempting to reach a base)
someone who travels on foot by running
a person who is employed to deliver messages or documents
(football) the player who is carrying (and trying to advance) the ball on an offensive play
a horizontal branch from the base of plant that produces new plants from buds at its tips