sieve vs screen

sieve and screen both are nouns.

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

As nouns, sieve and screen are synonyms defined as:

sieve and screen: a strainer for separating lumps from powdered material or grading particles

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

sieve: separate by passing through a sieve or other straining device to separate out coarser elements
screen: separate with a riddle, as grain from chaff

Other hyponyms of sieve include rice, resift, riddle, winnow.

As verbs, sieve and screen are synonyms defined as:

Other synonyms of sieve include screen out, sort.

sieve (noun)	screen (noun)
a strainer for separating lumps from powdered material or grading particles	a protective covering consisting of netting; can be mounted in a frame
	a covering that serves to conceal or shelter something
	a strainer for separating lumps from powdered material or grading particles
	partition consisting of a decorative frame or panel that serves to divide a space
	a protective covering that keeps things out or hinders sight
	the display that is electronically created on the surface of the large end of a cathode-ray tube
	a white or silvered surface where pictures can be projected for viewing
	the personnel of the film industry

sieve (verb)	screen (verb)
distinguish and separate out	examine methodically
separate by passing through a sieve or other straining device to separate out coarser elements	protect, hide, or conceal from danger or harm
check and sort carefully	prevent from entering
examine in order to test suitability	separate with a riddle, as grain from chaff
	project onto a screen for viewing
	examine in order to test suitability
	test or examine for the presence of disease or infection