THESAURUS
sealed
able, accepted, acknowledged, admitted, affirmed, agreed, airtight, allowed, approved, arranged, auricular, authenticated, avowed, between us, certified, close, compact, compacted, conceded, confessed, confidential, confirmed, contracted, countersigned, covenanted, dustproof, dusttight, endorsed, engaged, enigmatic, esoteric, fast, firm, gasproof, gastight, granted, hermetic, hermetically
sealed, in petto, incalculable, incognizable, inside, lightproof, lighttight, mysterious, not for publication, notarized, off the record, oilproof, oiltight, privileged, professed, promised, puzzling, rainproof, raintight, ratified, received, recognized, settled, shut fast, signed, smokeproof, smoketight, snug, stamped, staunch, stipulated, stormproof, stormtight, strange, sworn and affirmed, sworn to, tight, unapparent, unapprehended, unascertained, unbeknown, uncharted, unclassified, under privilege, undertaken, underwritten, undisclosed, undiscoverable, undiscovered, undivulged, unexplained, unexplored, unexposed, unfamiliar, unfathomed, unheard, unheard-of, unidentified, uninvestigated, unknowable, unknown, unperceived, unplumbed, unpublishable, unrevealed, unsuspected, untouched, validated, virgin, warranted, water-repellant, waterproof, watertight, windproof, windtight