linear vs lengthwise

linear and lengthwise both are adjectives.

Word	Noun	Adjective	Verb	Adverb
linear	No	Yes	No	No
lengthwise	No	Yes	No	Yes

linear (adjective)	lengthwise (adjective)
of or in or along or relating to a line; involving or having a single dimension	running or extending in the direction of the length of a thing
designating or involving an equation whose terms are of the first degree
of a circuit or device having an output that is proportional to the input
measured lengthwise
(of a leaf shape) long and narrow

linear (adverb)	lengthwise (adverb)
	in the direction of the length