star vs galaxy

star and galaxy both are nouns.

Word	Noun	Adjective	Verb	Adverb
star	Yes	Yes	Yes	No
galaxy	Yes	No	No	No

star (noun)	galaxy (noun)
the topology of a network whose components are connected to a hub	(astronomy) a collection of star systems; any of the billions of systems each having many stars and nebulae and dust
a star-shaped character * used in printing	a splendid assemblage (especially of famous people)
(astronomy) a celestial body of hot gases that radiates energy derived from thermonuclear reactions in the interior	tufted evergreen perennial herb having spikes of tiny white flowers and glossy green round to heart-shaped leaves that become coppery to maroon or purplish in fall
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

star (adjective)	galaxy (adjective)
indicating the most important performer or role