judo vs athletics

judo and athletics both are nouns.

Word	Noun	Adjective	Verb	Adverb
judo	Yes	No	No	No
athletics	Yes	No	No	No

As nouns, athletics is a hypernym of judo; that is, athletics is a word with a broader meaning than judo:

judo: a sport adapted from jujitsu (using principles of not resisting) and similar to wrestling; developed in Japan
athletics: an active diversion requiring physical exertion and competition

Other hypernyms of judo include sport, martial art.

judo (noun)	athletics (noun)
a sport adapted from jujitsu (using principles of not resisting) and similar to wrestling; developed in Japan	an active diversion requiring physical exertion and competition
	participation in sports events as an extracurricular activity
	a contest between athletes