| Rating | Solver | Clue |
|---|---|---|
| FISSURE | Narrow crack | |
| CLIFT | A cleft of crack; a narrow opening. | |
| CREVICE | A narrow opening resulting from a split or crack or the separation of a junction; a cleft; a fissure; a rent. | |
| CRACK | A partial separation of parts, with or without a perceptible opening; a chink or fissure; a narrow breach; a crevice; as, a crack in timber, or in a wall, or in glass. | |
| INTERSTICE | ...er; especially, a space between things closely set, or between the parts which compose a body; a narrow chink; a crack; a crevice; a hole; an ... | |