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Impermeable has 43 synonyms. The top synonyms for impermeable are firm, hard, close, dense, gluey, heavy, thick, closed and 35 more. Browse the full list below.
| Length
| Random | DefinitionA common synonym for impermeable is firm. Other synonyms include hard, close, dense, gluey.
Impermeable has 43 synonyms listed on Thesaurasize.
(adj): impossible to permeate; not allowing passage, especially of liquids; waterproof
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