output signal vs output

output signal and output both are nouns.

Word	Noun	Adjective	Verb	Adverb
output signal	Yes	No	No	No
output	Yes	No	Yes	No

As nouns, output signal and output are synonyms defined as:

output signal (noun)	output (noun)
signal that comes out of an electronic system	production of a certain amount
	final product; the things produced
	what is produced in a given time period
	signal that comes out of an electronic system
	the quantity of something (as a commodity) that is created (usually within a given period of time)

output signal (verb)	output (verb)
	to create or manufacture a specific amount