Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Flight Crew Last 90 Days 43; Flight Crew Total 2120; Flight Crew Type 2120
Confusion
ATC Issue All Types; Deviation / Discrepancy - Procedural Published Material / Policy; No Specific Anomaly Occurred Unwanted Situation
General None Reported / Taken
Chart Or Publication; Human Factors
The DEN NIIXX1 arrival [now NIIXX2] has two similar sounding fixes consecutive to each other; BSTON (pronounced 'Boston') and BOSSS; that could be easily confused/misheard.
Air carrier Captain reported similar sounding fixes on the NIIXX 1 [now NIIXX 2] arrival into Denver which might be confused or misheard.