Nature
ISTHMUS
An isthmus is a narrow strip of land connecting two larger landmasses, with water on either side. The Isthmus of Panama joins North and South America and is famous for its canal. The word comes from the Greek 'isthmos', meaning 'neck' of land.
ISTHMUS is the kind of word that shows up in themed word searches like Strands. Themed puzzles group words like this under a shared category — here, Nature.