THESAURUS
unventilated
airless, blank, blind, blind-alley, breathless, breezeless, cecal, choked, choked off, close, closed, constricted, contracted, dead, dead-end, ill-ventilated, oppressive, shut, squeezed shut, stifling, strangulated, stuffy, suffocating, unopen, unopened, unvented, windless
ROGET THESAURUS
unventilated
Closure
N
closure, occlusion, blockade, shutting up, obstruction, embolus, contraction, infarction, constipation, obstipation, blind alley, blind corner, keddah, cul-de-sac, caecum, imperforation, imperviousness, impermeability, stopper, closed, shut, operculated, unopened, unpierced, imporous, caecal, closable, imperforate, impervious, impermeable, impenetrable, impassable, unpassable, invious, pathless, wayless, untrodden, untrod,
unventilated, air tight, water tight, hermetically sealed, tight, snug.