Synonyms of proofer

1 Syllable
short, shut, firm, tied, sound, fast, proof, blind
2 Syllables
locked, cramping, airtight, pinching, plugged, skintight, choking, blocked, clumped, slammed, nailed, snapped, cutting, fixed, bolted, shrunken, crushing
3 Syllables
impervious, smothering, watertight, fastened, obstructed, hermetic, secure, padlocked
4 Syllables
impermeable
5 Syllables
impenetrable, uncomfortable