| Hot spot |
| Big spout |
| Jet spewer |
| Hot spring |
| Big shooter |
| Jet spouter |
| Jet creator |
| Jet launcher |
| Steam fountain |
| Natural gusher |
| Natural spring |
| Spouting spring |
| Hot-water gusher |
| Sporadic spouter |
| Geothermal spout |
| Yellowstone sight |
| Geological wonder |
| Volcanic eruption |
| Natural water jet |
| Spewing hot spring |
| Old Faithful, e.g. |
| It blows off steam |
| Old Faithful is one |
| Yellowstone spouter |
| Yellowstone feature |
| Natural steam source |
| One blowing off steam |
| Old Faithful, for one |
| Old Faithful, famously |
| Gas-fired water heater |
| Yellowstone attraction |
| Phenomenon at Yellowstone |
| Old Faithful, for example |
| It regularly blows its top |
| Natural hot water fountain |
| Spring in Yellowstone Park |
| Spring, from the Icelandic |
| Yellowstone Park attraction |
| Yellowstone's Steamboat, for one |
| Word from the Icelandic for "gush |
| Spring spouting steam and hot water |
| Spring discharging hot water and steam |
| Yellowstone's Lion, Steamboat or Castle |
| Spring that discharges steam and hot water |
| One of the few English words from Icelandic |
| Yellowstone National Park's Old Faithful, for one |