turn on vs turn-on

turn on is not a noun while turn-on is a noun.

Word	Noun	Adjective	Verb	Adverb
turn on	No	No	Yes	No
turn-on	Yes	No	No	No

turn on (noun)	turn-on (noun)
	something causing excitement or stimulating interest

turn on (verb)	turn-on (verb)
become hostile towards
get high, stoned, or drugged
cause to operate by flipping a switch
to evoke sexual feelings
cause to be agitated, excited, or roused
produce suddenly or automatically
be contingent on