pinnacles

/P IH1 N IH0 K AH0 L Z/
noun
  1. 1

    The highest point.

    ant:nadir
  2. 2

    A tall, sharp and craggy rock or mountain.

  3. 3

    An all-time high; a point of greatest achievement or success.

  4. 4

    An upright member, generally ending in a small spire, used to finish a buttress, to constitute a part in a proportion, as where pinnacles flank a gable or spire.

Antonyms

verb
  1. 1

    To put something on a pinnacle.

  2. 2

    To build or furnish with a pinnacle or pinnacles.

Source: https://en.wiktionary.org/wiki/pinnacle, https://en.wiktionary.org/wiki/pinnacles