plug

[1]	plug up , stop (up) , close (up/off) , seal (off/up) , cork , stopper , bung , block , jam , stuff , clog , obstruct , dam (up)
[2]	publicize , mention , promote , push , advertise , puff , commend , (Colloq) boost , beat the drum for
[3]	stop up , secure
[4]	plug away
[5]	punch

[1]	stopper , stopper , stopple , stopple , bung , cork
[2]	chew , chew , chaw , twist , quid , cud , quid , wad , pigtail , wad , cavendish
[3]	publicity , ballyhoo , hoopla , mention , promotion , hype , recommendation , puff , blurb , PR , advertisement , (Colloq) advert , hype
[4]	spark plug , sparking plug
[5]	male plug
[6]	fireplug , fire hydrant
[7]	hack , jade , nag