When I seen the "NBA", I thought of it as a acronym for the
National
Basketball
Association. Which is a brand that I wouldn't mess with.. but like you mentioned there are other potential acronyms like
Acronym Definition
NBA National Basketball Association
NBA National Book Award
NBA National Bar Association
NBA National Braille Association
NBA Narmada Bachao Andolan (India)
NBA National Boxing Association
NBA National Business Association
NBA Network Behavior Analysis
NBA No Boys Allowed
NBA National Band Association
NBA National Bison Association
NBA Net Book Agreement
NBA Next Best Alternative (finance)
NBA National Benevolent Association
NbA NanoBusiness Alliance
NBA National Beekeepers Association (New Zealand)
NBA National Board of Advisors
NBA National Business Agent
NBA Nevada Broadcasters Association
NBA Newmarket Business Association (Boston, Massachusetts)
NBA Nevada Brothel Association
NBA National Beef Ambassador (National Beef Association)
NBA National Benefit Administrators (Charlotte, NC)
NBA Nevada Bar Association
NBA National Bandmasters Association
NBA National Brassfoundry Association (UK)
NBA National Boating Association
NBA Nebraska Beekeepers Association
NBA National Blood Association
NBa None-Blocking Architecture
NBA Non-Parametric Boundary Analysis
NBA Nepal Beekeepers Association
NBA non-binding announcement
NBA N-Butyl Alcohol (chemistry)
https://acronyms.thefreedictionary.com/NBA
Other than the obvious "search query" National Basketball Association, the only other one that I believe can potentially make money is Nevada Brothel Association
https://www.google.ca/search?dcr=0&......1.1.64.psy-ab..1.1.229.0...101.nswX1dsTZNo
or Nevada Bar Association
https://www.google.ca/search?dcr=0&.....0...1.1.64.psy-ab..0.1.180....0.SIdCeNDSqrs
but really not sure if "Sedo" will accept those acronyms ..
If this was my domain, I would drop it and find a more generic money maker...trademarks can attrach lawyers..