Synonyms for Aperture:

n.

cavity, abyss, crater, cranny, channel, cleft, blowhole, chink. camera, cartridge, digicam, vent, camcorder, Asa, boom, outlet, darkroom, developer, open, celluloid. aperture (noun)
fissure, chink, vent, orifice, gap, opening, cleft, mouth.
entrance (noun)
entrance, access, opening, intake, entryway, input, door, ingress.
hole (noun)
gap, cleft, outlet, fissure, chink, orifice, vent, opening, chasm.
opening (noun)
embouchure, inlet, gate, pore, gap, mouth, chasm, orifice, hatch, yawning, portal.

Other synonyms:

camera, camcorder, fissure, cavity, blowhole, cranny, darkroom, cleft, cartridge, Asa, digicam, celluloid, chink. abyss, crater, developer, channel. outlet, boom. ventilator
vent.
Other relevant words:
camcorder, darkroom, boom, chink, outlet, blowhole, vent, Asa, crater, celluloid, channel, fissure, camera, cleft, cartridge, cavity, abyss, developer, digicam, cranny, open.

Usage examples for aperture

  1. A man sprang through the aperture Yield! – Night and Morning, Volume 3 by Edward Bulwer Lytton
  2. The double doors which separated the schoolroom from the parlour were ajar, and through the aperture one shrill voice after another could be heard, raised in monotonous perusal of Mrs. Chapone's " Letters to a Young Lady upon the Improvement of the Mind." – Chippinge Borough by Stanley J. Weyman
  3. This gate he opened half- way, standing in the aperture and looking up sullenly as the Roumis came down the narrow, slippery track which led to it. – The Golden Silence by C. N. Williamson and A. M. Williamson