furnace vs grate

furnace and grate both are nouns.

Word	Noun	Adjective	Verb	Adverb
furnace	Yes	No	No	No
grate	Yes	No	Yes	No

furnace (noun)	grate (noun)
an enclosed chamber in which heat is produced to heat buildings, destroy refuse, smelt or refine ores, etc.	a frame of iron bars to hold a fire
	a barrier that has parallel or crossed bars blocking a passage but admitting air
	a harsh rasping sound made by scraping something

furnace (verb)	grate (verb)
	make a grating or grinding sound by rubbing together
	scratch repeatedly
	reduce to small shreds or pulverize by rubbing against a rough or sharp perforated surface
	gnaw into; make resentful or angry
	furnish with a grate