cover vs screen

cover and screen both are nouns.

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

As nouns, cover and screen are synonyms defined as:

cover and screen: a covering that serves to conceal or shelter something

Other synonyms of cover include concealment, covert.

cover (noun)	screen (noun)
the act of concealing the existence of something by obstructing the view of it	a protective covering consisting of netting; can be mounted in a frame
fire that makes it difficult for the enemy to fire on your own individuals or formations	a covering that serves to conceal or shelter something
a false identity and background (especially one created for an undercover agent)	a strainer for separating lumps from powdered material or grading particles
a recording of a song that was first recorded or made popular by somebody else	partition consisting of a decorative frame or panel that serves to divide a space
bedding that keeps a person warm in bed	a protective covering that keeps things out or hinders sight
a covering that serves to conceal or shelter something	the display that is electronically created on the surface of the large end of a cathode-ray tube
covering for a hole (especially a hole in the top of a container)	a white or silvered surface where pictures can be projected for viewing
the protective covering on the front, back, and spine of a book	the personnel of the film industry
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)	screen (verb)
sit on (eggs)	examine methodically
clothe, as if for protection from the elements	protect, hide, or conceal from danger or harm
protect by insurance	prevent from entering
act on verbally or in some form of artistic expression	separate with a riddle, as grain from chaff
be responsible for reporting the details of, as in journalism	project onto a screen for viewing
maintain a check on; especially by patrolling	examine in order to test suitability
protect or defend (a position in a game)	test or examine for the presence of disease or infection
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