| rip current(noun, expression, study, science, aspect) |
| rip tide(noun, expression, study, science, aspect) |
| rogue wave(noun, expression, study, treatment, science) |
| rule of twelfths(noun, expression, study, science, aspect) |
| salinity(noun, form, study, science, field) |
| sea-level curve(noun, expression, study, science, system) |
| sea level(noun, expression, study, science, system) |
| sea state(noun, expression, study, treatment, science) |
| seabed(noun, study, science, system, structure) |
| seafloor spreading(noun, expression, study, science, system) |
| seamount(noun, study, science, system, structure) |
| seiche(noun, study, treatment, science, knowledge) |
| shallow water(noun, expression, study, treatment, science) |
| shallow water equation(noun, expression, study, treatment, science) |
| significant wave height(noun, expression, study, treatment, science) |
| slab pull(noun, expression, study, science, system) |
| slab suction(noun, expression, study, science, system) |
| slab window(noun, expression, study, science, system) |
| slack water(noun, expression, study, science, aspect) |
| soliton(noun, study, treatment, science, knowledge) |