cubic vs linear

cubic and linear both are adjectives.

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

cubic (adjective)	linear (adjective)
having the shape of a cube; having three dimensions	of or in or along or relating to a line; involving or having a single dimension
involving the cube and no higher power of a quantity or variable	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