1) Arouser 2) Attendee 3) Auditor 4) Baggageman 5) Batman 6) Bellboy 7) Bellhop 8) Bellman 9) Bridesmaid 10) Caddie 11) Checker 12) Conventioneer 13) Courtier 14) Cupbearer 15) Eavesdropper 16) Esquire 17) Famulus 18) Gillie 19) Groomsman 20) Hearer 21) Lifesaver 22) Linkboy 23) Linkman 24) Listener 1) Auditor 2) Beholder 3) Hearer 4) Listener 5) Maid of honor 6) Meeting participant 7) Observer 8) One caring for a patient 9) Perceiver 
• (n.) One who, or that which, attends.
At·tend'er noun One who, or that which, attends. 
noun a person who is present and participates in a meeting; `he was a regular attender at department meetings`; `the gathering satisfied both organizers and attendees`