insular
island
- peninsula
islet
marine
maritime - moist
ledge - oasis
tide - ebb
continent - terrestrial
region - endemic
- cosmopolitan (global)
subterranean
cavern - flaw
cleft - crevice
gap
zone - equator
longitude
altitude
latitude
meridiam - subsidiary
Arctic - Antarctica
- coastland
- contour
geography
horizon
lowland
plain - strait
channel
valley
volcano
plateau - basin
navigation - ranges
- salinity
sediment
elevation
formation - geothermy
troptical
tropics
temprate
