▶ USAGE: for several words with this suffix, e.g. ardor, armor, color, endeavor, favor, honor, labor, rumor, savior, the spelling -our is standard usage or a common alternate spelling in most other English-speaking countries
(ardour, armour, colour, etc.); other words, e.g. error, liquor, pallor, terror, are now always spelled with -or 1.
a person or thing that (does a specified
Webster’s New World College Dictionary, 4th Edition. Copyright © 2010 by
Houghton Mifflin Harcourt. All rights reserved.
Word origin of '-or'(sense 1) ME -our < OFr -our, -or, -eur < L -or, -ator; (sense 2) ME -our < OFr < L -or