attendant vs participant

attendant and participant both are nouns.

Word	Noun	Adjective	Verb	Adverb
attendant	Yes	Yes	No	No
participant	Yes	No	No	No

As nouns, participant is a hypernym of attendant; that is, participant is a word with a broader meaning than attendant:

Other hypernyms of attendant include player.

attendant (noun)	participant (noun)
an event or situation that happens at the same time as or in connection with another	someone who takes part in an activity
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

attendant (adjective)	participant (adjective)
being present (at a meeting or event, etc.)
occurring with or following as a consequence