furnace vs grating

furnace and grating both are nouns.

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

furnace (noun)	grating (noun)
an enclosed chamber in which heat is produced to heat buildings, destroy refuse, smelt or refine ores, etc.	a barrier that has parallel or crossed bars blocking a passage but admitting air
	a frame of iron bars to hold a fire
	optical device consisting of a surface with many parallel grooves in it; disperses a beam of light (or other electromagnetic radiation) into its wavelengths to produce its spectrum

furnace (adjective)	grating (adjective)
	unpleasantly harsh or grating in sound