football played with oval-shaped ball (rugby, American football, Australian rules etc)

Chinese olive; olive

olive oil

Mount of Olives (in the Christian passion story)

peridotite (geology)

olive branch; (fig.) conciliatory gesture; overture of goodwill; (fig.) favorable offer or invitation (e.g. of employment or admission)

olive tree

olivine (rock-forming mineral magnesium-iron silicate (Mg,Fe)2SiO4); peridot

olive-green (color)