lecturer (n.)

• acolyte
• almoner
• anagnost
• assistant
• associate
• beadle
• churchwarden
• clerk
• deacon
• deaconess
• elder
• emeritus
• expositor
• expounder
• instructor
• lector
• preacher
• precentor
• professor
• reader
• sacristan
• sermonizer
• sexton
• sidesman
• suisse
• thurifer
• tutor
• verger