showjumping vs equestrian sport

showjumping and equestrian sport both are nouns.

Word	Noun	Adjective	Verb	Adverb
showjumping	Yes	No	No	No
equestrian sport	Yes	No	No	No

As nouns, equestrian sport is a hypernym of showjumping; that is, equestrian sport is a word with a broader meaning than showjumping:

showjumping: riding horses in competitions over set courses to demonstrate skill in jumping over obstacles
equestrian sport: a sport that tests horsemanship

showjumping (noun)	equestrian sport (noun)
riding horses in competitions over set courses to demonstrate skill in jumping over obstacles	a sport that tests horsemanship