1) Arguable 2) At issue 3) Contestable 4) Controversial 5) Disputable 6) Dubious 7) Moot 8) Problematic 9) Problematical 10) Questionable 1) Arguable 2) BBC television game show 3) Capable of being debated 4) Capable of being disproved 5) Controversial 6) Disputable 7) Doubtful 8) Dubious 9) Far from certain 10) French word used in English 11) Having two sides 12) In dispute 13) In the gray area 14) Open to argument or debate 15) Open to doubt or debate 
• (a.) Liable to be debated; disputable; subject to controversy or contention; open to question or dispute; as, a debatable question.
De·bat'a·ble adjective [ Confer Old French debatable . See Debate .] Liable to be debated; disputable; subject to controversy or contention; open to question or dispute; as, a debatable question. The Debatable Land or Ground , 
[adj] - open to doubt or debate 2. [adj] - capable of being disproved
disputable adjective capable of being disproved
open to question; in dispute; doubtful: Whether or not he is qualified for the job is debatable. · capable of being debated.