attenuator vs electrical device

attenuator and electrical device both are nouns.

Word	Noun	Adjective	Verb	Adverb
attenuator	Yes	No	No	No
electrical device	Yes	No	No	No

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

attenuator: an electrical device for attenuating the strength of an electrical signal
electrical device: a device that produces or is powered by electricity

attenuator (noun)	electrical device (noun)
an electrical device for attenuating the strength of an electrical signal	a device that produces or is powered by electricity