Synonyms and Antonyms for river-boulder

1. river boulder (n.)

a boulder that has been carried by a river to a place remote from its place of origin

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2. boulder (n.)

a large smooth mass of rock detached from its place of origin

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3. Boulder (n.)

a town in north central Colorado; Rocky Mountains resort center and university town

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4. river (n.)

a large natural stream of water (larger than a creek)

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