athletics vs spar

athletics and spar both are nouns.

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

athletics (noun)	spar (noun)
an active diversion requiring physical exertion and competition	making the motions of attack and defense with the fists and arms; a part of training for a boxer
participation in sports events as an extracurricular activity	a stout rounded pole of wood or metal used to support rigging
a contest between athletes	any of various nonmetallic minerals (calcite or feldspar) that are light in color and transparent or translucent and cleavable