Horizontal
Part of speech: noun
Definition: A horizontal component of a structure.
Part of speech: adjective
Definition: perpendicular to the vertical; parallel to the plane of the horizon; level, flat. Pertaining to the horizon.
Example sentence: Emphasis was usually put on the horizontal acceleration factor, for the simple reason that ordinary structures have a built-in safety factor for the vertical component; that is, gravity.
Crosswise
Part of speech: adjective
Definition: crossing; lying across
Part of speech: adverb
Definition: transversely; so as to lie across