| Rating | Solver | Clue |
|---|---|---|
| ALTITUDE | Height above sea level | |
| ELEVATION | Height above sea level | |
| ISOBAR | A line connecting or marking places upon the surface of the earth where height of the barometer reduced to sea level is the same either at a gi... | |
| HEIGHT | The distance to which anything rises above its foot, above that on which in stands, above the earth, or above the level of the sea; altitude; t... | |
| HEAD | ... a stream or river; as, the head of the Nile; hence, the altitude of the source, or the height of the surface, as of water, above a given place,... | |
| SIPHON | A device, consisting of a pipe or tube bent so as to form two branches or legs of unequal length, by which a liquid can be transferred to a low... | |