1. landscape
1.1. ocean
1.1.1. a wave/a tube/a party wave
1.1.2. choppy/broken waves
1.1.3. the tide
1.1.3.1. comes in
1.1.3.2. goes out
1.1.4. the current
1.1.4.1. a rip
1.2. the seashore
1.2.1. the shoreline
1.2.2. a cliff
1.2.3. a sand dune
2. eqiupment
2.1. a beach tent
2.2. inflatables
2.2.1. a life ring
2.2.1.1. a beach ball
2.3. a bucket and a shovel
2.4. sunscreen
2.5. sunnies
2.6. a surfboard
2.7. a boogie board
3. Clothing
3.1. women
3.1.1. a bikini
3.1.1.1. a burqini
3.2. men
3.2.1. (swimming) trunks
3.3. unisex
3.3.1. a (swimming) costume - informal - a cossie/cossies
3.3.1.1. bathers
3.3.1.1.1. a swimsuit
3.4. a wetsuit
3.5. a rashie
4. marine animals
4.1. lethal
4.1.1. a box jellyfish
4.1.1.1. a blue-ringed octopus
4.1.1.1.1. sharks
4.2. non-lethal
4.2.1. a bluebottle/Portuguese man of war
4.2.2. a small jellyfish
4.2.3. a whale and a dolphin
5. activities
5.1. go
5.1.1. surfing
5.1.2. boogieboarding
5.1.3. bodysurfing
5.1.4. snorkeling
5.1.5. diving
5.1.6. kitesurfing
5.1.7. parasailing
5.2. take
5.2.1. a dip
5.2.2. a scenic coastal walk
5.3. build a sandcastle
5.4. play
5.4.1. beach volley ball
5.4.2. beach cricket
5.5. do
5.5.1. sunbathing