male plug vs electrical device

male plug and electrical device both are nouns.

Word	Noun	Adjective	Verb	Adverb
male plug	Yes	No	No	No
electrical device	Yes	No	No	No

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

male plug: an electrical device with two or three pins that is inserted in a socket to make an electrical connection
electrical device: a device that produces or is powered by electricity

male plug (noun)	electrical device (noun)
an electrical device with two or three pins that is inserted in a socket to make an electrical connection	a device that produces or is powered by electricity