silverware vs flatware

silverware and flatware both are nouns.

Word	Noun	Adjective	Verb	Adverb
silverware	Yes	No	No	No
flatware	Yes	No	No	No

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

silverware: tableware made of silver or silver plate or pewter or stainless steel
flatware: silverware eating utensils

Other hyponyms of silverware include silver, holloware, hollowware.

silverware (noun)	flatware (noun)
tableware made of silver or silver plate or pewter or stainless steel	silverware eating utensils
	tableware that is relatively flat and fashioned as a single piece