limelight vs lamp

limelight and lamp both are nouns.

Word	Noun	Adjective	Verb	Adverb
limelight	Yes	No	No	No
lamp	Yes	No	No	No

As nouns, lamp is a hypernym of limelight; that is, lamp is a word with a broader meaning than limelight:

limelight: a lamp consisting of a flame directed at a cylinder of lime with a lens to concentrate the light; formerly used for stage lighting
lamp: an artificial source of visible illumination

limelight (noun)	lamp (noun)
a lamp consisting of a flame directed at a cylinder of lime with a lens to concentrate the light; formerly used for stage lighting	an artificial source of visible illumination
a focus of public attention	a piece of furniture holding one or more electric light bulbs