Are hard waves crashing on rocks? Do waves collide in the ocean?
closed as unclear what you're asking by Hot Licks, David, Scott, RaceYouAnytime, waiwai933 Aug 29 '17 at 8:03
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Crash as a transitive verb means "to break violently," MW. As an intransitive verb it means "to break or go to pieces with." Crash is an apt description of waves meeting rocks, and is commonly used. Collide means "to come together with solid impact," MW. Waves coming from two or more directions (wind conditions or a point break, etc.) do collide, that is meet each other with a solid impact.
Technically waves pass through each other in the ocean, its called "superimposition". They dont "collide", which also carries a sense that they impact and stop, or are broken, etc. There's no collision. But that may not be much help in writing nontechnically.