| Clue | Length | Answer |
|---|---|---|
| unpassable | 13 letters | punctureproof |
Likely related crossword puzzle clues
- weatherproof
- Airtight
- ballproof
- bombproof
- Bulletproof
- burglarproof
- corrosionproof
- dampproof
- fire-resisting
- fireproof
- flameproof
- Foolproof
- hermetic
- holeproof
- impassable
- Impenetrable
- Impermeable
- impervious
- Impervious (to)
- leakproof
- noiseproof
- nonpuncturable
- Proof
- proof-against
- Resistant
- rustproof
- Shatterproof?
- shellproof
- soundproof
- Tight
- unpassable
- unperforable
- unpierceable
- Watertight