hallo¹/həʹloh/ noun (pl hallos)

hallo² or halloa /həʹloh(ə)/interj, noun, and verb (halloing halloaing) (halloed halloaed) (pl hallos halloas)

• button-down
• buttonhole
• buttonhole stitch
• buttonhook
• button mushroom
• button quail
• buttons
• button-through
• butt out
• buttress
• butt weld
• butt-weld
• butty
• butut
• butyl
• butyl rubber
• butyric
• butyric acid
• buxom
• buy
• buyback
• buyer
• buyer's market
• buy in
• buy-in