breaker vs electrical fuse

breaker and electrical fuse both are nouns.

Word	Noun	Adjective	Verb	Adverb
breaker	Yes	No	No	No
electrical fuse	Yes	No	No	No

As nouns, electrical fuse is a hypernym of breaker; that is, electrical fuse is a word with a broader meaning than breaker:

breaker: a device that trips like a switch and opens the circuit when overloaded
electrical fuse: an electrical device that can interrupt the flow of electrical current when it is overloaded

Other hypernyms of breaker include fuse, safety fuse.

breaker (noun)	electrical fuse (noun)
a device that trips like a switch and opens the circuit when overloaded	an electrical device that can interrupt the flow of electrical current when it is overloaded
waves breaking on the shore
a quarry worker who splits off blocks of stone