The term "peak of wave" refers to the highest point of a wave as it moves through water. It is a commonly used term in the fields of oceanography and surfing. There are several synonyms for the "peak of wave," including crest, summit, apex, and pinnacle. The crest is the highest point of the wave, while the summit refers to the highest point of a mountain, which can be used metaphorically to refer to the peak of a wave. The apex and pinnacle both have similar meanings, representing the highest point or culmination of something. Overall, all these words are used interchangeably to refer to the topmost point of a wave that can also create exciting moments for surfing enthusiasts.