player vs scene-stealer

player and scene-stealer both are nouns.

Word	Noun	Adjective	Verb	Adverb
player	Yes	No	No	No
scene-stealer	Yes	No	No	No

As nouns, scene-stealer is a hyponym of player; that is, scene-stealer is a word with a more specific, narrower meaning than player:

player: a theatrical performer
scene-stealer: an actor who draws more attention than other actors in the same scene

player (noun)	scene-stealer (noun)
a theatrical performer	an actor who draws more attention than other actors in the same scene
a person who participates in or is skilled at some game
someone who plays a music as a profession
a person who pursues a number of different social and sexual partners simultaneously
someone who takes part in an activity