Keywords
Abu Father
Dhahr Windward or North side
of a reef/island.
El Aruk Plural of Erg
Erg Pinnacle (singular)
Gota Section or piece of a reef, island or chain.
Habili A submerged reef (always submerged)
Halg Thin outcrop of a reef (means throat/neck)
Marsa Bay / gulf (bigger than a Sharm)
Ras A coastal head point (not islands) 
Sha'ab Reef
Sha'abrour Down current reef of a main reef
with same name
Sharm Enclosed bay
Umm Mother