player vs trouper

player and trouper both are nouns.

Word	Noun	Adjective	Verb	Adverb
player	Yes	No	No	No
trouper	Yes	No	No	No

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

player (noun)	trouper (noun)
a theatrical performer	an actor who travels around the country presenting plays
a person who participates in or is skilled at some game	a person who is reliable and uncomplaining and hard working
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