Find Synonyms

boulder Synonyms

Another word for boulder

Choosing another word for boulder depends on context, so the synonyms and similar words below are separated across 2 exact definitions 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
monolith
Weak
megalith
crag

• 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
rock-climb
scramble
Weak
clamber

Opposites of boulder

The opposite of boulder shifts depending on context. Common opposites include:

pebble
gravel
grain
See all opposites of boulder

• Nearby Words

bough
bougie
bouillon
boulder
boules
boulevard
bounce

Cite this Entry

Wordmom. (2026). Synonyms for Boulder. In Wordmom Thesaurus. Retrieved Nov 6, 2026, from https://wordmom.com/synonyms/boulder
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