Hypernyms for "opening"

anus aortic orifice aperture bell blastopore breach breech cardia cervix cervix uteri chasm cleft crack crevice curtain raiser cut cutting diastema embrasure escape hatch exit external orifice fenestella fenestra first base fissure fly fly front fontanel fontanelle foramen gap grille gun muzzle hiatus hole inlet intake interstice introitus issue lattice lunette mouth muzzle naris neck neck opening nodes of Ranvier os outlet pass-through peace initiative pocket port porta hepatis porthole possible pylorus Ranvier''s nodes rear of barrel rear of tube rent rift rima rip salutation scissure slit snag soft spot spiracle split spout stoma tear teaser throat urethral orifice uterine cervix vent way out wicket window