maths vs linear

maths is a noun but linear is not a noun.

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

maths (noun)	linear (noun)
a science (or group of related sciences) dealing with the logic of quantity and shape and arrangement

maths (adjective)	linear (adjective)
	of or in or along or relating to a line; involving or having a single dimension
	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