Weather Phenomenon; Group of Hippos
This page is the CodyCross answer for the clue below from Deserts of the world, Group 1612, Puzzle 2 (Rugged Mountains).
Question is: Weather Phenomenon; Group of Hippos
and the answer is: THUNDER
Word Meaning:
THUNDER — The loud rumbling, cracking, or crashing sound caused by expansion of rapidly heated air around a lightning bolt.
Definitions from Wiktionary.