The difference between Pole and Rod
When used as nouns, pole means originally, a stick, whereas rod means a straight, round stick, shaft, bar, cane, or staff.
When used as verbs, pole means to propel by pushing with poles, to push with a pole, whereas rod means to reinforce concrete with metal rods.
check bellow for the other definitions of Pole and Rod
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Pole as a noun:
Originally, a stick; now specifically, a long and slender piece of metal or (especially) wood, used for various construction or support purposes.
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Pole as a noun (angling):
A type of basic fishing rod.
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Pole as a noun:
A long sports implement used for pole-vaulting; now made of glassfiber or carbon fiber, formerly also metal, bamboo and wood have been used.
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Pole as a noun (slang, spotting):
A telescope used to identify birds, aeroplanes or wildlife.
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Pole as a noun (historical):
A unit of length, equal to a perch (¼ chain or 5½ yards).
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Pole as a noun (motor racing):
Pole position.
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Pole as a noun (US, rap music, slang):
A gun.
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Pole as a verb:
To propel by pushing with poles, to push with a pole.
Examples:
"Huck Finn poled that raft southward down the Mississippi because going northward against the current was too much work."
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Pole as a verb:
To identify something quite precisely using a telescope.
Examples:
"He poled off the serial of the Gulfstream to confirm its identity."
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Pole as a verb (transitive):
To furnish with poles for support.
Examples:
"to pole beans or hops"
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Pole as a verb (transitive):
To convey on poles.
Examples:
"to pole hay into a barn"
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Pole as a verb (transitive):
To stir, as molten glass, with a pole.
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Pole as a noun:
Either of the two points on the earth's surface around which it rotates; also, similar points on any other rotating object.
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Pole as a noun:
A point of magnetic focus, especially each of the two opposing such points of a magnet (designated north and south).
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Pole as a noun (geometry):
A fixed point relative to other points or lines.
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Pole as a noun (electricity):
A contact on an electrical device (such as a battery) at which electric current enters or leaves.
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Pole as a noun (complex analysis):
For a meromorphic function f(z), any point a for which f(z) \rightarrow \infty as z \rightarrow a.
Examples:
"The function <math>f(z) = \frac{1}{z-3}</math> has a single pole at <math>z = 3</math>."
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Pole as a noun (obsolete):
The firmament; the sky.
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Pole as a noun:
Either of the states that characterize a bipolar disorder.
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Pole as a verb (transitive):
To induce piezoelectricity in (a substance) by aligning the dipoles.
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Rod as a noun:
A straight, round stick, shaft, bar, cane, or staff.
Examples:
"The circus strong man proved his [[strength]] by bending an iron rod, and then straightening it."
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Rod as a noun:
A longitudinal pole used for forming part of a framework such as an awning or tent.
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Rod as a noun (fishing):
A long slender usually tapering pole used for angling; fishing rod.
Examples:
"When I hooked a snake and not a fish, I got so scared I dropped my rod in the water."
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Rod as a noun:
A stick, pole, or bundle of switches or twigs (such as a birch), used for personal defense or to administer corporal punishment by whipping.
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Rod as a noun:
An implement resembling and/or supplanting a rod (particularly a cane) that is used for corporal punishment, and metonymically called the rod, regardless of its actual shape and composition.
Examples:
"The judge imposed on the thief a sentence of fifteen strokes with the rod."
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Rod as a noun:
A stick used to measure distance, by using its established length or task-specific temporary marks along its length, or by dint of specific graduated marks.
Examples:
"I notched a rod and used it to measure the length of rope to cut."
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Rod as a noun (archaic):
A unit of length equal to 1 pole, a perch, ¼ chain, 5½ yards, 16½ feet, or exactly 5.0292 meters (these being all equivalent).
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Rod as a noun (US):
An implement held vertically and viewed through an optical surveying instrument such as a transit, used to measure distance in land surveying and construction layout; an engineer's rod, surveyor's rod, surveying rod, leveling rod, ranging rod. The modern engineer's or surveyor's rod commonly is eight or ten feet long and often designed to extend higher. In former times a surveyor's rod often was a single wooden pole or composed of multiple sectioned and socketed pieces, and besides serving as a sighting target was used to measure distance on the ground horizontally, hence for convenience was of one rod or pole in length, that is, 5½ yards.
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Rod as a noun (archaic):
A unit of area equal to a square rod, 30¼ square yards or 1/160 acre.
Examples:
"The house had a small yard of about six rods in size."
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Rod as a noun:
A straight bar that unites moving parts of a machine, for holding parts together as a connecting rod or for transferring power as a drive-shaft.
Examples:
"The engine threw a rod, and then went to pieces before our eyes, springs and coils shooting in all directions."
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Rod as a noun (anatomy):
A rod cell: a rod-shaped cell in the eye that is sensitive to light.
Examples:
"The rods are more sensitive than the cones, but do not discern color."
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Rod as a noun (biology):
Any of a number of long, slender microorganisms.
Examples:
"He applied a gram positive stain, looking for rods indicative of ''Listeria''."
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Rod as a noun (chemistry):
A stirring rod: a glass rod, typically about 6 inches to 1 foot long and 1/8 to 1/4 inch in diameter that can be used to stir liquids in flasks or beakers.
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Rod as a noun (slang):
A pistol; a gun.
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Rod as a noun (slang, vulgar):
A penis.
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Rod as a noun (slang):
A hot rod, an automobile or other passenger motor vehicle modified to run faster and often with exterior cosmetic alterations, especially one based originally on a pre-1940s model or (currently) denoting any older vehicle thus modified.
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Rod as a noun (ufology):
A rod-shaped object that appears in photographs or videos traveling at high speed, not seen by the person recording the event, often associated with extraterrestrial entities.
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Rod as a noun (mathematics):
A .
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Rod as a noun (rail transport):
A or connecting rod, which links the driving wheels of a steam locomotive.
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Rod as a verb (construction):
To reinforce concrete with metal rods.
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Rod as a verb (slang, vulgar, transitive):
To penetrate sexually.
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Rod as a verb (slang):
To hot rod.