shunt circuit vs closed circuit

shunt circuit and closed circuit both are nouns.

Word	Noun	Adjective	Verb	Adverb
shunt circuit	Yes	No	No	No
closed circuit	Yes	No	No	No

As nouns, closed circuit is a hypernym of shunt circuit; that is, closed circuit is a word with a broader meaning than shunt circuit:

shunt circuit: a closed circuit in which the current divides into two or more paths before recombining to complete the circuit
closed circuit: a complete electrical circuit around which current flows or a signal circulates

Other hypernyms of shunt circuit include loop.

shunt circuit (noun)	closed circuit (noun)
a closed circuit in which the current divides into two or more paths before recombining to complete the circuit	a complete electrical circuit around which current flows or a signal circulates