coverall vs jumper

coverall and jumper both are nouns.

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

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

coverall: a loose-fitting protective garment that is worn over other clothing
jumper: a coverall worn by children

Other hyponyms of coverall include dust coat, duster, gabardine, gaberdine, smock, boilers suit, boilersuit, overall.

coverall (noun)	jumper (noun)
a loose-fitting protective garment that is worn over other clothing	(basketball) a player releases the basketball at the high point of a jump
	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