Synonyms|230Antonyms|32|Broader|3Narrower|0Related|172

114 entries under adjective topic. ×

3
pressure-tight(tight, proof, impervious, hermetic)
3
rainproof(resistant, impervious, watertight, waterproof)
3
solid(close, set, hard, tough)
3
substantial(close, set, hard, tough)
2
air-tight(tight, proof, impervious, hermetic)
2
compacted(solid, dense, compressed)
2
compressed(set, hard, tough, firm)
2
concentrated(set, hard, tough, firm)
2
condensed(set, hard, tough, firm)
2
congested(close, solid, short, substantial)
2
consolidated(close, solid, short, substantial)
2
constipated
2
crowded(close, solid, short, substantial)
2
jam-packed(close, solid, short, substantial)
2
opaque
2
packed(close, solid, short, substantial)
2
resistant(proof, unaffected, unyielding, unbending)
2
retentive(tight, proof, impervious, hermetic)
2
water-resistant
2
water-tight(tight, proof, impervious, hermetic)
For more, visit Impermeable on Power Thesaurus
11 years ago|4.5k views|share |citing 
APASmart Define. (2015). impermeable thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/impermeable/thesaurus/synonyms
ChicagoSmart Define. 2015. "impermeable thesaurus" https://smartdefine.org/impermeable/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, impermeable thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/impermeable/thesaurus/synonyms>.
MLASmart Define. "impermeable thesaurus" 14 April 2015. Web. 25 September 2026. <https://smartdefine.org/impermeable/thesaurus/synonyms>