Synonyms and related words :
air hole, armhole, blowhole, bullet-hole, bunghole, cringle, deadeye, eye, eyelet, gland, grommet, guide, keyhole, knothole, loop, loophole, manhole, mousehole, packing, padding, peephole, pigeonhole, pinhole, placket, placket hole, porthole, punch-hole, spiracle, stopping, stuffing, tampon, tap, vent, venthole, wadding