16-letter words starting with bu
- butterfly stroke — a swimming stroke in which the arms are plunged forward together in large circular movements
- butternut squash — a variety of squash with brownish-yellow rind and orange flesh
- button one's lip — to stop talking: often imperative
- button snakeroot — blazing star (sense 1)
- buying behaviour — the behaviours displayed by consumers when they purchase things, such as preferences, price points, etc