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