What does Bun stand for?

Bunion - Medicine (EDAA)

Biomass Users Network (SAUS)

Biunnilium - Chemical element (EPT)

Blood Urea Nitrogen - Medicine

Buenaventura - Colombia - Airport symbol (AD)

Bulletin (NTCM)

Bunion - Orthopedics and podiatry (DAVI)

Bunnythorpe - New Zealand - Seismograph station code, US Geological Survey - Closed (SEIS)

Burt Marine Inc., Vineyard Haven, MA - Manufacturer code for watercraft hull identification number (USCG)

Sherbro - Language code (ETLW)