strainer vs sieve

strainer and sieve both are nouns.

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

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

strainer: a filter to retain larger pieces while smaller pieces and liquids pass through
sieve: a strainer for separating lumps from powdered material or grading particles

Other hyponyms of strainer include colander, cullender, screen, tea-strainer.

strainer (noun)	sieve (noun)
a filter to retain larger pieces while smaller pieces and liquids pass through	a strainer for separating lumps from powdered material or grading particles

strainer (verb)	sieve (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