halloo/həʹlooh/ interj, noun, and verb (hallooing, hallooed, pl halloos)

• bird's-foot trefoil
• birdshot
• bird's-nesting
• bird's nest soup
• birds of a feather
• birdstrike
• bird table
• bird-watching
• birefringence
• bireme
• biretta
• biriani
• birk
• birl
• Biro
• birr
• birth
• birth certificate
• birth control
• birthday
• birthday suit
• birthing
• birthing pool
• birthmark
• birth mother