LENGTHWISE is a term used to describe something that is arranged or oriented in the same direction as its length. LONGITUDINAL (12 letters) is a synonym for LENGTHWISE, meaning arranged ALONG the longest dimension of something. ENDLONG (7 letters) and ENDWAYS (7 letters) are also synonyms for LENGTHWISE, meaning arranged at the end of something in the same direction as its length. AXIAL (5 letters) and ALONG (5 letters) are similar terms, meaning arranged in the same direction as the axis of something. ENDON (5 letters) is another synonym for LENGTHWISE, meaning arranged at the end of something in the same direction as its length.