1. group of islands found close together in the sea   archipelago   plateau   gulf   tributary   Hint Half-n-half Clue   2. low, flat or almost level land   harbor   tributary   plain   gulf   Half-n-half Clue   3. land jutting out into the sea   isthmus   iceberg   valley   cape   Half-n-half Clue   4. extensive stretch of elevated, level land   harbor   estuary   oasis   plateau   Half-n-half Clue   5. small river flowing into a bigger main river   archipelago   strait   gulf   tributary   Half-n-half Clue   6. large area of sea partly surrounded by land   bay   gulf   glacier   plateau   Half-n-half Clue   7. low land between hills or mountains   isthmus   valley   glacier   archipelago   Half-n-half Clue