spotlight vs light up

spotlight is a noun but light up is not a noun.

Word	Noun	Adjective	Verb	Adverb
spotlight	Yes	No	Yes	No
light up	No	No	Yes	No

As verbs, light up is a hypernym of spotlight; that is, light up is a word with a broader meaning than spotlight:

Other hypernyms of spotlight include illume, illuminate, illumine, light.

spotlight (noun)	light up (noun)
a lamp that produces a strong beam of light to illuminate a restricted area; used to focus attention of a stage performer
a focus of public attention

spotlight (verb)	light up (verb)
illuminate with a spotlight, as in the theater	introduce light into
move into the foreground to make more visible or prominent	begin to smoke
	become clear
	start to burn with a bright flame
	ignite