Horizontal vs. Horizonal — Which is Correct Spelling?

Of, relating to, or near the horizon.

Parallel to or in the plane of the horizon.

At right angles to a vertical line.

Occupying or restricted to the same level in a hierarchy

(Medicine) Of or relating to transmission of infection by contact with or physical proximity to an infected individual or fomite.

Something, such as a line, plane, or object, that is horizontal.

Perpendicular to the vertical; parallel to the plane of the horizon; level, flat.

(marketing) Relating to horizontal markets

(archaic) Pertaining to the horizon.

(wine) Involving wines of the same vintages but from different wineries.

Having the two notes sound successively.

Relating to sexual intercourse.

A horizontal component of a structure.

(geology) Horizon.

A Tasmanian shrub or small tree whose main trunk tends to lean over and grow horizontally, Anodopetalum biglandulosum

Pertaining to, or near, the horizon.

Parallel to the horizon; on a level; as, a horizontalline or surface.

Measured or contained in a plane of the horizon; as, horizontal distance.

Something that is oriented horizontally

Parallel to or in the plane of the horizon or a base line;