opening Synonyms - page 4

dell dehiscence debut debouch endosmosis entrance entree fracture foyer foreword foramen foothold fissure first fenestral felling eyelet eyehole exploratory exordium entry dawning abysm break breach blowhole beginning baring availability assart armhole archway aperture antrum alpha alcove aisle caesura castellation cavity crevasse cranny crack conduit commencement col clough cleft clearing chink