grating vs furnace

grating and furnace both are nouns.

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

grating (noun)	furnace (noun)
a barrier that has parallel or crossed bars blocking a passage but admitting air	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
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

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