-or; -our (primarily British)

(Latin: a suffix; state of, result of; he who, that which)

A suffix that forms nouns. British spelling is usually -our.
erector (i REK tuhr) (s) (noun), erectors (pl)
Someone who assembles or fits together the separate component parts of buildings or other related property: All of the erectors, including the pipe fitters, welders, and steel assemblers, were necessary to put up the new city hall in Rodger's urban area.
error (s) (noun), errors (pl)
1. An act, assertion, or belief that unintentionally deviates from what is correct, right, or true: It was an error on Mark's part to hold the map upside down causing him and his family to get lost.
2. The condition of having incorrect or false knowledge: Because of an error in the referral information, the police ended up arresting the wrong person.
3. The act or an instance of deviating from an accepted code of behavior: Not wearing a tie for his friend's formal wedding was an error on the part of James, the best man.
4. A reference to something that is unintentionally done the wrong way; for example, as a result of poor judgment or not being careful: Kate's silly cat exhibited several errors by jumping on the bed and later jumping on top of the table.
5. A belief or opinion that is contrary to facts or to established doctrines: The error Mrs. White made was in not checking with the principal before scheduling a trip with the students.
6. The state of holding incorrect beliefs or opinions, or the fact of acting wrongly or misguidedly caused by human misconceptions: It was Cleo's error that she spilled the juice because she didn't realize that the lid on the container was loose.
7. The state or fact of being a mistake, or of being inappropriate or unacceptable: The error on the page was glaringly obvious when Roy's friend pointed it out to him.
8. In baseball, a fielding misplay, called when the official scorer judges that a play should have either led to an out or prevented a runner from advancing: The shortstop was charged with an error by the umpire.
9. The failure of a computer program, subroutine, or system to produce an anticipated result: The flashing light on the keyboard of the computer indicated a program error.
10. A variation between the true value of a mathematical quantity and a calculated or measured value: The clerk at the store committed an error when she was calculating the amount of taxes for the purchases.
11. Etymology: from Old French errur, from Latin errorem, "a wandering, a straying, a mistake"; from errare, "to wander".
evictor
Someone who recovers (property) from a person by a legal process.
excavator
1. A large machine with a hinged metal bucket attached to a hydraulic arm, used to move large quantities of earth or soil or for lifting.
2. A power-driven machine for digging, moving, or transporting loose gravel, sand, or soil.
3. A person or animal that digs or hollows something out; especially, someone who is engaged in archaeological excavationn.
4. In medicine, an instrument like a large sharp spoon or scoop, used in scraping out pathologic tissue.
5. In dentistry, an instrument, generally a small "spoon" or curette, for cleaning out and shaping a carious cavity preparatory to filling.
excelsior
exhorter (s) (noun), exhorters (pl)
expectorator (s) (noun), expectorators (pl)
1. A person who spits, or ejects saliva or phlegm from the mouth.
2. Someone who expels matter; such as, phlegm, from the throat or lungs by coughing and spitting it out.
expositor (s) (noun), expositors (pl)
Someone who provides detailed information or explanations; such as, a commentator: Many painters are lucid expositors and some of them are even vivid writers.
extensor
Any of various muscles that extend or straighten some part of the body; especially, a flexed arm or leg.
factor
favor (s), favors (pl); favour (British)
fervor (s) (noun), fervors (pl)
1. An intensity of emotion or passion: The Smiths were enthusiastic churchgoers on Sundays which expressed their religious fervor.
2. A warmth or glow of feeling, a vehemence, or an intense zeal: The applause of the audience following the concert was filled with such fervor that the musicians had to give an encore!
3. A high degree of heat and a glowing condition: The animals in the farmer's barn had to flee from the intenseĀ fervor caused by the fire where the livestock were.
Descriptive of an intense feeling.
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flux sensor
A sensor that measures the flow of energy as a fluid.
fumator (s) (noun), fumators (pl)
Someone who deceives others or who throws up a smoke screen.
functor
Someone or something that performs an operation, activity, or a function.