limit β the final, utmost, or furthest boundary or point as to extent, amount, continuance, procedure, etc.: the limit of his experience; the limit of vision.
boundary β The boundary of an area of land is an imaginary line that separates it from other areas.
edge β a line or border at which a surface terminates: Grass grew along the edges of the road. The paper had deckle edges.
pole β Reginald, 1500β58, English cardinal and last Roman Catholic archbishop of Canterbury.
margin β the space around the printed or written matter on a page.
depth β The depth of something such as a river or hole is the distance downwards from its top surface, or between its upper and lower surfaces.
excess β An amount of something that is more than necessary, permitted, or desirable.
height β extent or distance upward: The balloon stopped rising at a height of 500 feet.
acme β The acme of something is its highest point of achievement or excellence.
apex β An Apex or an Apex ticket is a ticket for a journey by air or rail which costs less than the standard ticket, but which you have to book a specified period in advance.
apogee β The apogee of something such as a culture or a business is its highest or its greatest point.
ceiling β A ceiling is the horizontal surface that forms the top part or roof inside a room.
climax β The climax of something is the most exciting or important moment in it, usually near the end.
consummation β a consummating or being consummated; completion; fulfillment
crest β The crest of a hill or a wave is the top of it.
crown β A crown is a circular ornament, usually made of gold and jewels, which a king or queen wears on their head at official ceremonies. You can also use crown to refer to anything circular that is worn on someone's head.
culmination β Something, especially something important, that is the culmination of an activity, process, or series of events happens at the end of it.
maximum β the greatest quantity or amount possible, assignable, allowable, etc.
nadir β Astronomy. the point on the celestial sphere directly beneath a given position or observer and diametrically opposite the zenith.