ADJ

calm, smooth
a calm sea after the storm
choppy, rough
The sea was too rough for sailing in small boats
deep
shallow
blue, grey
cold
warm
inland
open
The fishing boats headed for the open sea

VERB + SEA

cross
We crossed the Mediterranean Sea on a cruise ship
go to (= become a sailor)
put (out) to
The ship put to sea (= left port) in deteriorating weather conditions
be lost at
They were lost at sea when their ship sank en route for Madeira
stare out to
She stood on the cliff, staring out to sea

SEA + VERB

rise
In recent years the sea has risen by a couple of inches
recede, retreat
The sea has retreated a little since the river was diverted

SEA + NOUN

water
bottom, floor
breeze
creature
port (also seaport), voyage
cliff, front, view

PREP

at ~
We spent three weeks at sea
across the ~
We sailed across the Black Sea in a yacht
by (the) ~
We sent our furniture by sea. They live by the sea
down to the ~
We'll go down to the sea for a swim before dinner
in/into the ~
I love swimming in the sea!
on the ~
three ships sailing on the sea
out to ~
She fell overboard and was swept out to sea

PHRASES

the bottom/edge/middle/surface of the sea, the boom/booming/ murmur/roar/sound of the sea

ADJ

choppy, dangerous, heavy, mountainous, raging, rough, stormy
A week of heavy seas has created problems for fishermen

VERB + SEA

roam, sail
He has sailed the seven seas

PHRASES

on the high seas, the seven seas

ADJ

vast

PREP

~ of
She scanned the vast sea of faces below her