opening Synonyms - page 5

caesura blowhole baring availability assart armhole archway arch antrum alpha alcove aisle admission access cavity cervical chasm dehiscence debut debouch dawning crevasse cranny corridor conduit col clough cleavage clearance clearing chink chimney abysm position ostium os origination oriel opportunism openness opener onset oculus ocellus occasion nook nonresidence niche nascency outfall