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boulder Synonyms

Another word for boulder

Looking for synonyms for boulder? Explore similar words and another word for boulder, grouped by exact definition and ranked by match strength.
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• noun (Context 1)

A large rock or stone, typically one that has been worn smooth by erosion or transported by water or glaciers; in geology, any rock fragment with a diameter greater than 256 millimeters (about 10 inches).

Usage Example

"Hikers had to scramble over several massive granite boulders that had fallen across the mountain trail."

Strongest
rock
Strong
stone
crag
Weak
monolith

• verb (Context 2)

To engage in rock climbing on large boulders or low rock formations without the use of ropes or harnesses.

Usage Example

"On sunny weekends, local climbers gather in the state park to climb along the sandstone outcrops."

Strong
climb
scramble
Weak
clamber

Opposites of boulder

Looking for antonyms? The opposite of boulder varies depending on the context. Here are a few common opposites:

pebble
grain
granule
See all opposites of boulder

• Nearby Words

boubou
bougainvillea
bouillon
boulder
bouquet
bouvardia
bovid

Cite this Entry

Wordmom. (2026). Synonyms for Boulder. In Wordmom Thesaurus. Retrieved Oct 18, 2026, from https://wordmom.com/synonyms/boulder
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