OR gate vs OR circuit

OR gate and OR circuit both are nouns.

Word	Noun	Adjective	Verb	Adverb
OR gate	Yes	No	No	No
OR circuit	Yes	No	No	No

As nouns, OR gate and OR circuit are synonyms defined as:

OR gate and OR circuit: a gate circuit in a computer that fires when any of its inputs fire

OR gate (noun)	OR circuit (noun)
a gate circuit in a computer that fires when any of its inputs fire	a gate circuit in a computer that fires when any of its inputs fire