Alpha Crucis vs star

Alpha Crucis and star both are nouns.

Word	Noun	Adjective	Verb	Adverb
Alpha Crucis	Yes	No	No	No
star	Yes	Yes	Yes	No

Alpha Crucis (noun)	star (noun)
the brightest star in the Southern Cross	the topology of a network whose components are connected to a hub
	a star-shaped character * used in printing
	(astronomy) a celestial body of hot gases that radiates energy derived from thermonuclear reactions in the interior
	any celestial body visible (as a point of light) from the Earth at night
	an actor who plays a principal role
	someone who is dazzlingly skilled in any field
	a performer who receives prominent billing
	a plane figure with 5 or more points; often used as an emblem

Alpha Crucis (adjective)	star (adjective)
	indicating the most important performer or role