player vs attender

player and attender both are nouns.

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

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

player (noun)	attender (noun)
a theatrical performer	someone who waits on or tends to or attends to the needs of another
a person who participates in or is skilled at some game	a person who is present and participates in a meeting
someone who plays a music as a profession	someone who listens attentively
a person who pursues a number of different social and sexual partners simultaneously
someone who takes part in an activity