INSTRUCTOR
teacher, instructor
(noun) a person whose occupation is teaching
Source: WordNet® 3.1
Etymology
Noun
instructor (plural instructors)
One who instructs; a teacher.
Synonyms
• instructer (much less common)
Hyponyms
• instructress (female, dated)
• instructrix (female, dated)
Source: Wiktionary
In*struct"or, n. Etym: [L., a preparer: cf. F. instructeur.] [Written
also instructer.]
Definition: One who instructs; one who imparts knowledge to another; a
teacher.
Source: Webster’s Unabridged Dictionary 1913 Edition