crosshatch, cover, hachure, incubate, concoct, think up, dream up, think of, brood, serving hatch, more...

birth, deliver, give birth

sliding, barn, rolling, sliding barn, rolling barn, sliding rolling, rolling rolling, more...

open, main, young, forward, small, rear, outer, large, top, cross, inner

ship opening,   sub opening,   hail opening,   door to attic,   submarine door,   emerge from an egg,   attic door,   grade opening,   trapdoor cover,   airplane door