different between caster vs casper

English

cast +? -er; the wheel sense comes from obsolete cast (“to turn”).

(UK, General Australian, General New Zealand) IPA^(key): /?k??st?(r)/, /?kæst?(r)/
(US, Canada) IPA^(key): /?kæst?r/
Rhymes: -??st?(r)
Homophone: castor

caster (plural casters)

Someone or something that casts
A wheeled assembly attached to a larger object at its base to facilitate rolling. A caster usually consists of a wheel (which may be plastic, a hard elastomer, or metal), an axle, a mounting provision (usually a stem, flange, or plate), and sometimes a swivel (which allows the caster to rotate for steering).
A shaker with a perforated top for sprinkling condiments such as sugar, salt, pepper, etc.
A stand to hold a set of shakers or cruets.
(automotive) The angle of the axis around which a car's front wheels rotate when the steering wheel is turned, with a vertical axis being defined as zero caster.

caster (third-person singular simple present casters, present participle castering, simple past and past participle castered)

Cartes, Cestar, acters, carest, carets, cartes, caters, crates, creats, racest, reacts, recast, rescat, reäcts, traces

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