We don't have synonyms for kettle falls yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are little falls.
(N) :
(Salish: Shonitkwu, meaning "roaring or noisy waters", also Schwenetekoo translated as "Keep Sounding Water"bio of James Goudie at Genealogy.com) an ancient and important salmon fishing site on the upper reaches of the Columbia River, in what is today the U.S. state of Washington, near the Canada–US border.
(N) :
(Salish: Shonitkwu, meaning "roaring or noisy waters", also Schwenetekoo translated as "Keep Sounding Water"bio of James Goudie at Genealogy.com) an ancient and important salmon fishing site on the upper reaches of the Columbia River, in what is today the U.S. state of Washington, near the Canada–US border.