silent butler vs receptacle

silent butler and receptacle both are nouns.

Word	Noun	Adjective	Verb	Adverb
silent butler	Yes	No	No	No
receptacle	Yes	No	No	No

As nouns, receptacle is a hypernym of silent butler; that is, receptacle is a word with a broader meaning than silent butler:

silent butler: a small receptacle with a handle and a hinged lid; used for collecting crumbs or ashes
receptacle: a container that is used to put or keep things in

silent butler (noun)	receptacle (noun)
a small receptacle with a handle and a hinged lid; used for collecting crumbs or ashes	a container that is used to put or keep things in
	an electrical (or electronic) fitting that is connected to a source of power and equipped to receive an insert
	enlarged tip of a stem that bears the floral parts