You know what it looks like… but what is it called?
TAKE THE QUIZ“aso”
We have one entry that includes the term aso.
Aso, Mount
geographical namevolcanic mountain in central Kyushu, Japan; has five volcanic cones grouped around a crater 15 miles (24 kilometers) long with walls 2000 feet (610 meters) high
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Merriam-Webster unabridged