1) Coast 2) Seacoast 3) Seashore 
The intertidal zone is the region of land which is submerged during high tide and exposed during low tide.
Associated with the area of the shore between low and high tide lines
the coastal marine zone between high and low tide; also called the littoral zone
a part of the shore or reef that is exposed to the air at low tide and covered by water at high tide. 
<marine biology> Located between the elevation of the lowest yearly tide and the elevation of the highest yearly tide. ... (09 Oct 1997) ... 
Between the extremes of high and low tide. 
The intertidal zone is the region of land which is submerged during high tide and exposed during low tide.
The coastal zone measuring from the lowest to the highest tide mark. The intertidal zone is subject to alternating periods of flooding and drying.
[adj] - of or relating to the littoral area above the low-tide mark
The zone between the high and LOW WATER marks.
The area of shore that is covered at high tide and uncovered at low tide. Also called the littoral zone.
adjective of or relating to the littoral area above the low-tide mark
that part of the shore above the low-tide mark
of or pertaining to the littoral region that is above the low-water mark and below the high-water mark.