Synonyms for plug

blockage consisting of an object designed to fill a hole tightly (noun)

• stopper
• stopple

a wad of something chewable as tobacco (noun)

• chew
• chaw
• cud
• quid
• wad

blatant or sensational promotion (noun)

• ballyhoo
• hoopla
• hype

electrical device that fits into the cylinder head of an internal-combustion engine and ignites the gas by means of an electric spark (noun)

an electrical device with two or three pins that is inserted in a socket to make an electrical connection (noun)

an upright hydrant for drawing water to use in fighting a fire (noun)

• fireplug

an old or over-worked horse (noun)

• hack
• jade
• nag

fill or close tightly with or as if with a plug (verb)

• secure

persist in working hard (verb)

deliver a quick blow to (verb)

• punch