electronics vs linear

electronics is a noun but linear is not a noun.

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

electronics (noun)	linear (noun)
the branch of physics that deals with the emission and effects of electrons and with the use of electronic devices

electronics (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