Synonyms|127Antonyms|3|Broader|6Narrower|4Related|70
22
rock(noun, stone, metal, cliff, slab)
16
stone(noun, block, lump, surface, chunk)
6
slab(noun, stone, chunk)
5
eccentric
4
pebble(noun, stone, metal, slab, crystal)
3
rock formation(expression, idiom)
3
lodge
2
crag(noun, stone, bluff, metal, cliff)
2
bluff(noun, cliff)
2
slag
2
wall(noun, cliff)
2
cobblestone
2
brick
1
bowlder(noun, rotundity)
1
cliff(noun, cliff)
1
ball
1
boulders
1
globe
1
reef(noun, cliff)
1
cobble
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APASmart Define. (2016). boulder thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/boulder/thesaurus/synonyms
ChicagoSmart Define. 2016. "boulder thesaurus" https://smartdefine.org/boulder/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2016, boulder thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/boulder/thesaurus/synonyms>.
MLASmart Define. "boulder thesaurus" 23 February 2016. Web. 20 September 2026. <https://smartdefine.org/boulder/thesaurus/synonyms>