brainstem vs bulb

brainstem and bulb both are nouns.

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

brainstem (noun)	bulb (noun)
the part of the brain continuous with the spinal cord and comprising the medulla oblongata and pons and midbrain and parts of the hypothalamus	electric lamp consisting of a transparent or translucent glass housing containing a wire filament (usually tungsten) that emits light when heated by electricity
	a rounded part of a cylindrical instrument (usually at one end)
	a rounded dilation or expansion in a canal or vessel or organ
	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