fair-and-square vs just

fair-and-square and just both are adjectives.

Word	Noun	Adjective	Verb	Adverb
fair-and-square	No	Yes	No	No
just	No	Yes	No	Yes

fair-and-square (adjective)	just (adjective)
just and honest	used especially of what is legally or ethically right or proper or fitting
	fair to all parties as dictated by reason and conscience
	free from favoritism or self-interest or bias or deception; conforming with established standards or rules
	of moral excellence

fair-and-square (adverb)	just (adverb)
	and nothing more
	only a moment ago
	(used for emphasis) absolutely
	only a very short time before
	indicating exactness or preciseness
	exactly at this moment or the moment described
	possibly (indicating a slight chance of something being true)
	by a little