cover vs plaster

cover and plaster both are nouns.

Word	Noun	Adjective	Verb	Adverb
cover	Yes	No	Yes	No
plaster	Yes	No	Yes	No

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

cover (noun)	plaster (noun)
the act of concealing the existence of something by obstructing the view of it	adhesive tape used in dressing wounds
fire that makes it difficult for the enemy to fire on your own individuals or formations	a surface of hardened plaster (as on a wall or ceiling)
a false identity and background (especially one created for an undercover agent)	a medical dressing consisting of a soft heated mass of meal or clay that is spread on a cloth and applied to the skin to treat inflamed areas or improve circulation etc.
a recording of a song that was first recorded or made popular by somebody else	a mixture of lime or gypsum with sand and water; hardens into a smooth solid; used to cover walls and ceilings
bedding that keeps a person warm in bed	any of several gypsum cements; a white powder (a form of calcium sulphate) that forms a paste when mixed with water and hardens into a solid; used in making molds and sculptures and casts for broken limbs
a covering that serves to conceal or shelter something
covering for a hole (especially a hole in the top of a container)
the protective covering on the front, back, and spine of a book
a natural object that covers or envelops
a fixed charge by a restaurant or nightclub over and above the charge for food and drink

cover (verb)	plaster (verb)
sit on (eggs)	dress by covering with a therapeutic substance
clothe, as if for protection from the elements	coat with plaster
protect by insurance	apply a heavy coat to
act on verbally or in some form of artistic expression	apply a plaster cast to
be responsible for reporting the details of, as in journalism	affix conspicuously
maintain a check on; especially by patrolling	cover conspicuously or thickly, as by pasting something on
protect or defend (a position in a game)
hold within range of an aimed firearm
play a higher card than the one previously played
be responsible for guarding an opponent in a game
provide with a covering or cause to be covered
form a cover over
copulate with a female, used especially of horses
cover as if with a shroud
put something on top of something else
travel across or pass over
hide from view or knowledge
spread over a surface to conceal or protect
be sufficient to meet, defray, or offset the charge or cost of
to take an action to protect against future problems
invest with a large or excessive amount of something
help out by taking someone's place and temporarily assuming his responsibilities
provide for
span an interval of distance, space or time
include in scope; include as part of something broader; have as one's sphere or territory
make up for shortcomings or a feeling of inferiority by exaggerating good qualities