Morpheme
-(o)(u)r
Type
suffix
Denotation
noun suffix, agent suffix
Etymology
Middle English -our; Old French -our; Latin -orem, from -or
Evidence
abductor, actor, actress, ambulatory, ancestor, author, bailor, bisector, convector, debtor, donor, dormitory, error, fluor, glamour, historic, history, honor, horror, -ory, sculptor, sculptress, sculptrix, senator, survivor, tenor, terror
Notes
British English favors -our, American English favors -or
