-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.
miner, minor, minor
miner (MIGH nuhr) (noun)
An individual who digs for precious metals or other underground resources: Greg's neighbor is the fourth generation in his family to be a coal miner.
minor (MIGH nuhr) (adjective)
1. Relatively unimportant: Philip is a minor poet who has published two books during his career.
2. Relating to something which does not involve serious risk to one’s life: Laurel has a minor illness that requires her to stay in bed for just a few days.
minor (MIGH nuhr) (noun)
Someone who has not achieved the age of majority and therefore not yet able to assume civic responsibilities: Janine will be a minor until her next birthday, which is in three months; then, she will be classified as an adult.
minor (MIGH nuhr) (adjective)
In music, referring to the intervals in a musical scale whereby the third and the fifth tones are lowered or flattened, giving the composition a very sad or depressed quality: When listening to the song, which was written in a minor key, Karin became very thoughtful and sad; she like melodies written in major keys better because they gave the songs more pep and vigor.

The company employed a young coal digger who was the first minor miner to be hired in several years.

mirador (s) (noun), miradors (pl)
1. A window, balcony, or small tower providing an extensive view: The fair maiden stood on the mirador and watched the jousting match that was being performed in the courtyard below.
2. Etymology: from Catalan mirar, "to view" and Spanish, "to look"; from Latin mirari, "to wonder at".
narrator
natator
A swimmer.
navigator
negator, negater (s) (noun); negators, negaters (pl)
A person who has a contrary of non-positive view about everything.
neutral conductor
1. A conductor of a polyphase circuit or of a single-phase, three-wire circuit which is intended to have a potential such that the potential differences between it and each of the other conductors are approximately equal in magnitude and are also equally spaced in phase.
2. In electricity, in a polyphase system, a conductor which does not carry a current unless the system becomes unbalanced.
nociceptor
1. A class of sense organs uniquely excited by noxious stimuli that threaten or produce actual tissue damage.
2. A receptor that is stimulated by injury; a receptor for pain.

The pain circuit extends from the body's periphery; including the skin and other tissues outside the central nervous system; to the spinal cord and the brain.

In a healthy system, a tissue injury causes pain-sensing nerve cells, or nociceptors, to send a pain-signal message to nerve cells in the dorsal horn of the spinal cord, which in turn pass the message to the brain, which interprets it as pain.

In erythromelagia and other peripheral neuropathies, malfunctions in the nociceptor cells send pain signals even when there is no injury.

—"The Pain Gate" by David Dobbs,
Scientific American Mind, April/May, 2007; page 51.
nocifensor
A name for a system of nerves in the skin and mucous membranes that are concerned with local defense, or protecting tissue, against injury.
objector
obliviator
The act of memory modification which can be used by any wizard, by using the spell, "Obliviate" as described in the fictional universe of the Harry Potter series as written by J.K. Rowling.

An Obliviator is the designation for a Ministry of Magic employee who has the task of modifying the memory of a Muggle after witnessing incidents belonging to the magic world.

A Muggle is a term, sometimes used in a pejorative manner, from the fictional Harry Potter series of books that refers to a human who is a member of the non-magical community.

oblocutor
A disputer; a gainsayer (someone who declares something to be untrue or to be invalid).
odor, odour (British spelling)
1. That property of a substance that is perceptible by the sense of smell; scent, smell; sometimes, specifically, sweet or pleasing scent; fragrance.
2. A substance that emits a sweet smell or scent; a perfume; especially, incense, spice, ointment, etc.; also, an odoriferous flower.
3. A smell or scent, whether pleasant or unpleasant.
operator
1. Someone who operates a machine or device; a switchboard operator.
2. The owner or manager of a business or an industrial enterprise.
3. Someone who deals aggressively in stocks or commodities.
4. A person who is adept at accomplishing goals through shrewd or unscrupulous maneuvers.
5. In mathematics, a function, especially one from a set to itself; such as, differentiation of a differentiable function or rotation of a vector.
6. In genetics, a chromosomal segment of DNA that regulates the activity of the structural genes of an operon by interacting with a specific repressor.
orator
1. A person who delivers a speech or oration.
2. Someone who gives speeches; especially, somebody skilled in giving formal, ceremonial, or persuasive public addresses.