jumper vs jumper cable

jumper and jumper cable both are nouns.

Word	Noun	Adjective	Verb	Adverb
jumper	Yes	No	No	No
jumper cable	Yes	No	No	No

As nouns, jumper cable is a hyponym of jumper; that is, jumper cable is a word with a more specific, narrower meaning than jumper:

Other hyponyms of jumper include booster cable, jumper lead, lead.

jumper (noun)	jumper cable (noun)
(basketball) a player releases the basketball at the high point of a jump	a jumper that consists of a short piece of wire
a sleeveless dress resembling an apron; worn over other clothing
a loose jacket or blouse worn by workmen
a small connector used to make temporary electrical connections
a coverall worn by children
a crocheted or knitted garment covering the upper part of the body
an athlete who competes at jumping
a person who jumps