[n] a personified abstraction that teaches; "books were his teachers"; "experience is a demanding teacher"
[n] a person whose occupation is teaching
instructor - (3 syllables)
abstract, abstraction, art teacher, catechist, coach, demonstrator, don, educator, English professor, English teacher, French teacher, governess, instructress, math teacher, mathematics teacher, missionary, music teacher, pedagogue, preceptor, private instructor, reading teacher, riding master, school teacher, schoolteacher, science teacher, section man, teacher-student relation, teaching fellow, tutor
1. One who teaches or instructs; one whose business or occupation is to instruct others; an instructor; a tutor.
2. One who instructs others in religion; a preacher; a minister of the gospel; sometimes, one who preaches without regular ordination. The teachers in all the churches assembled. --Sir W. Raleigh.