plane
(adj) : of a surface: Perfectly flat or level
(n) : a flat surface extending infinitely in all directions; a level of existence. (eg, astral plane)
(v) : to smooth (wood) with a plane; to move in a way that lifts the bow of a boat out of the water
synonyms: degree, level, stage more», point, shape, form, power tool, edge tool, hand tool, heavier-than-air craft