trough vs receptacle

trough and receptacle both are nouns.

Word	Noun	Adjective	Verb	Adverb
trough	Yes	No	No	No
receptacle	Yes	No	No	No

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

trough (noun)	receptacle (noun)
a channel along the eaves or on the roof; collects and carries away rainwater	a container that is used to put or keep things in
a container (usually in a barn or stable) from which cattle or horses feed	an electrical (or electronic) fitting that is connected to a source of power and equipped to receive an insert
a long narrow shallow receptacle	enlarged tip of a stem that bears the floral parts
a narrow depression (as in the earth or between ocean waves or in the ocean bed)
a treasury for government funds
a concave shape with an open top