feedback loop vs feedback circuit

feedback loop and feedback circuit both are nouns.

Word	Noun	Adjective	Verb	Adverb
feedback loop	Yes	No	No	No
feedback circuit	Yes	No	No	No

As nouns, feedback loop and feedback circuit are synonyms defined as:

feedback loop and feedback circuit: a circuit that feeds back some of the output to the input of a system

feedback loop (noun)	feedback circuit (noun)
a circuit that feeds back some of the output to the input of a system	a circuit that feeds back some of the output to the input of a system