conventioneer vs attendant

conventioneer and attendant both are nouns.

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

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

Other hypernyms of conventioneer include attendee, attender, meeter.

conventioneer (noun)	attendant (noun)
someone who attends a convention	an event or situation that happens at the same time as or in connection with another
	someone who waits on or tends to or attends to the needs of another
	a person who is present and participates in a meeting

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