disparity - inequality or difference in some respect

pocket - an opening at the corner or on the side of a billiard table into which billiard balls are struck

nodes of Ranvier, Ranvier's nodes - small gaps in the myelin sheath of medullated axons

foramen, hiatus - a natural opening or perforation through a bone or a membranous structure

breach - an opening (especially a gap in a dike or fortification)

chasm - a deep opening in the earth's surface

crack, scissure, cleft, crevice, fissure - a long narrow opening

hole - an opening into or through something

mouth - an opening that resembles a mouth (as of a cave or a gorge); "he rode into the mouth of the canyon"; "they built a fire at the mouth of the cave"

rift - a gap between cloud masses; "the sun shone through a rift in the clouds"

rent, rip, tear, snag, split - an opening made forcibly as by pulling apart; "there was a rip in his pants"; "she had snags in her stockings"

Earth's surface, surface - the outermost level of the land or sea; "earthquakes originate far below the surface"; "three quarters of the Earth's surface is covered by water"

window - an opening that resembles a window in appearance or function; "he could see them through a window in the trees"

space - an empty area (usually bounded in some way between things); "the architect left space in front of the building"; "they stopped at an open space in the jungle"; "the space between his teeth"

lacuna, blank - a blank gap or missing part

opening - a vacant or unobstructed space that is man-made; "they left a small opening for the cat at the bottom of the door"

spark gap - the gap between two high-potential terminals

mountain pass, notch, pass - the location in a range of mountains of a geological formation that is lower than the surrounding peaks; "we got through the pass before it started to snow"

water gap - a pass in a mountain ridge through which a stream flows

wind gap - a pass in a mountain ridge with no stream flowing through it

cut-in, insert - (film) a still picture that is inserted and that interrupts the action of a film

cut-in, insert - (broadcasting) a local announcement inserted into a network program

delay, holdup - the act of delaying; inactivity resulting in something being put off until a later time

interposition, interjection, interpellation, interpolation - the action of interjecting or interposing an action or remark that interrupts

abruption, breaking off - an instance of breaking off suddenly

barracking, heckling - shouting to interrupt a speech with which you disagree

open, open up - cause to open or to become open; "Mary opened the car door"