square off vs concert

square off is not a noun while concert is a noun.

Word	Noun	Adjective	Verb	Adverb
square off	No	No	Yes	No
concert	Yes	No	Yes	No

As verbs, concert is a hyponym of square off; that is, concert is a word with a more specific, narrower meaning than square off:

Other hyponyms of square off include clear, solve, clinch, compromise.

square off (noun)	concert (noun)
	a performance of music by players or singers not involving theatrical staging

square off (verb)	concert (verb)
settle conclusively; come to terms	settle by agreement
	contrive (a plan) by mutual agreement