jumping vs high jump

jumping and high jump both are nouns.

Word	Noun	Adjective	Verb	Adverb
jumping	Yes	No	No	No
high jump	Yes	No	No	No

As nouns, high jump is a hyponym of jumping; that is, high jump is a word with a more specific, narrower meaning than jumping:

jumping: the act of participating in an athletic competition in which you must jump
high jump: the act of jumping as high as possible over a horizontal bar

Other hyponyms of jumping include broad jump, long jump.

jumping (noun)	high jump (noun)
the act of participating in an athletic competition in which you must jump	the act of jumping as high as possible over a horizontal bar
the act of jumping; propelling yourself off the ground	a competition that involves jumping as high as possible over a horizontal bar