bobsled vs athletics

bobsled and athletics both are nouns.

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

bobsled (noun)	athletics (noun)
a long racing sled (for 2 or more people) with a steering mechanism	an active diversion requiring physical exertion and competition
formerly two short sleds coupled together	participation in sports events as an extracurricular activity
	a contest between athletes

bobsled (verb)	athletics (verb)
ride a bobsled