The best replacement for sea is ocean.

The best alternatives to sea are rated as following:
★★★★★  ocean
★★★  lake
★★  sf
★★  reed sea
★  gulf
★  kosher salt
★  ocean difference
★  den
★  north sea
★  sf odds
★  red sea
  es
  ocean differences
  no
  titanic
  jane eyre
  san fran
  bay
  sea of japan
  table salt
  pkware
  mediterranean sea
  carmel
  lake chad
  allure of the sea
  jaws
  sf nfl
  sea of reeds
  on land
  mountains
  stl
  sea
  sea of galilee
  ocean definition
  atl
  oceans
  an ocean

Your alternative for sea is not listed? Suggest!
Speaking about sea, one probably shouldn't forget about coastline.

Other search terms related to sea and their ratings are:
★★★★★ coastline
beach
You have in mind a companion for sea and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of sea in all years. Click on graph for more.
sea
ocean
lake