sieve vs sifter

sieve and sifter both are nouns.

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

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

sieve: a strainer for separating lumps from powdered material or grading particles
sifter: a household sieve (as for flour)

Other hyponyms of sieve include riddle, dirt sifter, soil sifter.

sieve (noun)	sifter (noun)
a strainer for separating lumps from powdered material or grading particles	a household sieve (as for flour)

sieve (verb)	sifter (verb)
distinguish and separate out
separate by passing through a sieve or other straining device to separate out coarser elements
check and sort carefully
examine in order to test suitability