1) Balanced 2) Candid 3) Disinterested 4) Dispassionate 5) Evenhanded 6) Fair 7) Indifferent 8) Just 9) Neutral 10) Non racist 11) Open-minded 12) Unbiased 13) Unbiassed 14) Unpartial 15) Unprejudiced 16) Unwarped 1) Balanced 2) Cold-eyed 3) Detached 4) Disinterested 5) Dispassionate 6) Equitable 7) Even-handed 8) Fair 9) Fair-minded 10) French word used in English 11) Indifferent 12) Just 13) Neutral 14) Not partial or biased 15) Showing lack of favoritism 16) Unbiased 17) Unbiassed 18) Unprejudiced 
• (a.) Not partial; not favoring one more than another; treating all alike; unprejudiced; unbiased; disinterested; equitable; fair; just.
Im·par'tial adjective [ Prefix im- not + partial : confer French impartial .] Not partial; not favoring one more than another; treating all alike; unprejudiced; unbiased; disinterested; equitable; fair; just. Shak. « Jove is impartial , and to both the same.&#...
[adj] - showing lack of favoritism
Not having or showing any favouritism to one side in a dispute
adjective showing lack of favoritism; `the cold neutrality of an impartial judge`
not partial or biased; fair; just: an impartial judge.
[SAT terms] free from undue bias or preconceived opinions