Natural, Hot Fountain That Blows Hot Water/steam
Puzzle 11 of Brad Pitt Easy Pack
Question is: Natural, Hot Fountain That Blows Hot Water/steam
and the answer is: GEYSER
Word Meaning:
GEYSER — (planetology, geology, volcanology) A boiling natural spring which throws forth jets of water, mud, etc., at frequent intervals, driven upwards by the expansive power of steam.
Definitions from Wiktionary.