symposiast vs attendee

symposiast and attendee both are nouns.

Word	Noun	Adjective	Verb	Adverb
symposiast	Yes	No	No	No
attendee	Yes	No	No	No

As nouns, attendee is a hypernym of symposiast; that is, attendee is a word with a broader meaning than symposiast:

Other hypernyms of symposiast include attendant, attender, meeter.

symposiast (noun)	attendee (noun)
someone who participates in a symposium	a person who is present and participates in a meeting