filament vs bulb

filament and bulb both are nouns.

Word	Noun	Adjective	Verb	Adverb
filament	Yes	No	No	No
bulb	Yes	No	No	No

filament (noun)	bulb (noun)
a thin wire (usually tungsten) that is heated white hot by the passage of an electric current	electric lamp consisting of a transparent or translucent glass housing containing a wire filament (usually tungsten) that emits light when heated by electricity
a threadlike structure (as a chainlike series of cells)	a rounded part of a cylindrical instrument (usually at one end)
the stalk of a stamen	a rounded dilation or expansion in a canal or vessel or organ
a very slender natural or synthetic fiber	lower or hindmost part of the brain; continuous with spinal cord; (`bulb' is an old term for medulla oblongata)
	a modified bud consisting of a thickened globular underground stem serving as a reproductive structure
	anything with a round shape resembling a teardrop