Synonyms of maritime

2 Syllables
yachting, naval, deep-sea, seagoing, shorer
3 Syllables
littoral, nautical, seaside, marine, seafaring, amphibious, thalassic, aquatic, oceangoing, oceanic, sea-loving, sailorly, pelagic, ocean-going, saltwater, neptunian
4 Syllables
natatory, natatorial, hydrographic
5 Syllables
navigational, oceanographic