
Boulder
Size Matters
A boulder is specifically a large rock, distinguishable from smaller rocks or pebbles.

They sat on a boulder overlooking the valley.
Naturally Formed
Boulders are created naturally; they aren't shaped or placed by humans.

Boulders lined the natural boundary of the field.
Outdoor Context
Boulders are found outdoors, often in mountainous or rural areas, not urban environments.

The campsite was nestled among several mossy boulders.
Compare with
CliffFormationHumpMoundMountainRidgeRockStone
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