plug vs stopper

plug and stopper both are nouns.

Word	Noun	Adjective	Verb	Adverb
plug	Yes	No	Yes	No
stopper	Yes	No	Yes	No

As nouns, plug and stopper are synonyms defined as:

plug and stopper: blockage consisting of an object designed to fill a hole tightly

Other synonyms of plug include stopple.

As verbs, stopper is a hyponym of plug; that is, stopper is a word with a more specific, narrower meaning than plug:

Other hyponyms of plug include stopple, tampon, chink, cork, cork up.

plug (noun)	stopper (noun)
an old or over-worked horse	blockage consisting of an object designed to fill a hole tightly
blockage consisting of an object designed to fill a hole tightly	(bridge) a playing card with a value sufficiently high to insure taking a trick in a particular suit
an upright hydrant for drawing water to use in fighting a fire	an act so striking or impressive that the show must be delayed until the audience quiets down
electrical device that fits into the cylinder head of an internal-combustion engine and ignites the gas by means of an electric spark	a remark to which there is no polite conversational reply
an electrical device with two or three pins that is inserted in a socket to make an electrical connection
blatant or sensational promotion
a wad of something chewable as tobacco

plug (verb)	stopper (verb)
persist in working hard	close or secure with or as if with a stopper
insert as a plug
insert a plug into
replace the center of a coin with a baser metal
make a plug for; praise the qualities or in order to sell or promote
deliver a quick blow to
fill or close tightly with or as if with a plug