Wave height refers to the distance from the crest of a wave to the trough, or the lowest point between two crests. Synonyms for wave height include amplitude, tidal range, swell height, and sea state. Amplitude is the extent of deviation of a wave from its average position and can be used to describe the height of a wave. Tidal range refers to the difference between high and low tide levels and is a measure of the height of the waves. Swell height refers to the size of the waves generated by distant storms, while sea state describes the overall roughness of the ocean surface. All of these terms provide a means of quantifying the height of waves and can be used interchangeably depending on the context in which they are used.