1. Lengthwise.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• kongwise,
• pongwise,
• oongwise,
• lingwise,
• lkngwise,
• llngwise,
• lpngwise,
• l0ngwise,
• l9ngwise,
• lobgwise,
• lomgwise,
• longwize,
• longweise,
• longwisee,
• longwsie,
• hongwise,
• mongwise,
• long-wize,
• long-weise,
• long-wisee

• longest,
• longways,
• longsighted,
• longish,
• long whist.

The adjective form of the word "longwise" is "longitudinal".

The plural form of the word "longwise" is "longwises".

The singular form of the word "longwise" is "longwise". It is an adverb that describes the direction of something, such as laying or orienting it lengthwise. The term does not change when used in singular or plural contexts.