argue vs spar

argue is not a noun while spar is a noun.

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

As verbs, spar is a hyponym of argue; that is, spar is a word with a more specific, narrower meaning than argue:

argue (noun)	spar (noun)
	making the motions of attack and defense with the fists and arms; a part of training for a boxer
	a stout rounded pole of wood or metal used to support rigging
	any of various nonmetallic minerals (calcite or feldspar) that are light in color and transparent or translucent and cleavable

argue (verb)	spar (verb)
have an argument about something	fight verbally
give evidence of	box lightly
present reasons and arguments	fight with spurs
	furnish with spars