openings, entries, entrances, mouths, channels, passages, conduits, ducts, vents, apertures, gaps, holes, slots, fissures, cracks, breaches, orifices, pores, perforations, voids, clefts, chinks, crevi... [more]
openings, entries, entrances, mouths, channels, passages, conduits, ducts, vents, apertures, gaps, holes, slots, fissures, cracks, breaches, orifices, pores, perforations, voids, clefts, chinks, crevi... [more]