track star vs whizz

track star and whizz both are nouns.

Word	Noun	Adjective	Verb	Adverb
track star	Yes	No	No	No
whizz	Yes	No	Yes	No

As nouns, whizz is a hypernym of track star; that is, whizz is a word with a broader meaning than track star:

Other hypernyms of track star include ace, adept, champion, genius, hotshot, maven, mavin, sensation, star, superstar, virtuoso, whiz, wiz, wizard.

track star (noun)	whizz (noun)
a star runner	someone who is dazzlingly skilled in any field

track star (verb)	whizz (verb)
	move along very quickly
	make a soft swishing sound