The Collaborative International Dictionary of English v.0.48:
Obscure \Ob*scure"\, v. t. [imp. & p. p. Obscured
([o^]b*sk[=u]rd"); p. pr. & vb. n. Obscuring.] [L.
obscurare, fr. obscurus: cf. OF. obscurer. See Obscure, a.]
To render obscure; to darken; to make dim; to keep in the
dark; to hide; to make less visible, intelligible, legible,
glorious, beautiful, or illustrious.
They are all couched in a pit hard by Herne's oak, with
obscured lights. --Shak.
Why, 't is an office of discovery, love,
And I should be obscured. --Shak.
There is scarce any duty which has been so obscured by
the writings of learned men as this. --Wake.
And seest not sin obscures thy godlike frame? --Dryden.
Moby Thesaurus II by Grady Ward, 1.0:
148 Moby Thesaurus words for "obscured":
abstruse, armored, beamless, beclouded, bedazzled,
between the lines, beyond one, black, black as night, blind,
blindfold, blindfolded, buried, caliginous, cased, ceiled, cloaked,
close, clouded, coated, complex, complicated, concealed, coped,
covered, covert, cowled, crabbed, cramp, cryptic, curtained, dark,
dark as night, dark as pitch, darkened, darkling, darksome, dazed,
dazzled, delitescent, difficult, dormant, ebon, ebony, eclipsed,
encapsulated, encapsuled, encased, enveloped, enwrapped, esoteric,
excecate, filmed, floored, garbled, guarded, hard,
hard to understand, hibernating, hid, hidden, hooded, hoodwinked,
housed, in a cloud, in a fog, in eclipse, in purdah, in the wings,
incommunicado, intricate, jumbled, knotty, latent, loricate,
loricated, lurking, mantled, masked, muffled, mysterious, mystic,
night-black, night-clad, night-cloaked, night-dark,
night-enshrouded, night-filled, night-mantled, night-veiled,
obfuscated, obscure, occult, occulted, overtechnical, packaged,
paved, perplexed, pitch-black, pitch-dark, pitchy, possible,
potential, privy, rayless, recondite, roofed-in, scrambled,
screened, scummed, secluded, secluse, secret, sequestered,
sheathed, shelled, shielded, shrouded, sleeping, snow-blind,
snow-blinded, starless, submerged, sunless, swathed, tenebrious,
tenebrose, tenebrous, tented, tough, under an eclipse, under cover,
under house arrest, under the surface, under wraps, underground,
underlying, unilluminated, unknown, unlighted, unlit, unmanifested,
veiled, virtual, walled, walled-in, wrapped, wrapped in clouds