square up vs solve

square up and solve both are verbs.

Word	Noun	Adjective	Verb	Adverb
square up	No	No	Yes	No
solve	No	No	Yes	No

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

Other hyponyms of square up include clear, concert, clinch, compromise.

square up (verb)	solve (verb)
make square	find the solution to (a problem or question) or understand the meaning of
settle conclusively; come to terms	find the solution
even up the edges of a stack of paper, in printing	settle, as of a debt