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Fastness synonyms
făst'nĭs
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The state of being swift
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Rash or headlong action; precipitateness:
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  1. Rash or headlong action; precipitateness:
  2. The act of hurrying carelessly or recklessly
  3. Rapidity of action or motion:
Speed, swiftness; the condition of being rapid
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  1. Speed, swiftness; the condition of being rapid
  2. (Physics) A measure of velocity relative to the speed of light
  3. (Physics) A measure of the velocity of a particle in a beam relative to the beam#s axis
The state or quality of being hard (in various senses)
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  1. The state or quality of being hard (in various senses)
  2. The relative resistance of a mineral to scratching, as measured by the Mohs scale.
  3. The relative resistance of a metal or other material to denting, scratching, or bending.
A group or department of private guards:
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  1. A group or department of private guards:
  2. Measures adopted, as by a business or homeowner, to prevent a crime such as burglary or assault:
  3. Measures adopted to prevent escape:
(Uncountable) The state or quality of being sound.
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  1. (Uncountable) The state or quality of being sound.
  2. (Countable) The result or product of being sound.
  3. (Logic) The property of a logical theory that whenever a wff is a theorem then it must also be valid. Symbolically, letting T represent a theory within logic L, this can be represented as the property that whenever is true, then must also be true, for any wff φ of logic L.
Resistance to change, deterioration, or displacement.
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  1. Resistance to change, deterioration, or displacement.
  2. The capacity of an object to return to equilibrium or to its original position after having been displaced
  3. The ability of an object, such as a ship or aircraft, to maintain equilibrium or resume its original, upright position after displacement, as by the sea or strong winds.
The quality or state of being stable, or firmly established; stability.
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  1. The quality or state of being stable, or firmly established; stability.
  2. Part or all of this entry has been imported from the 1913 edition of Webster's Dictionary, which is now free of copyright and hence in the public domain. The imported definitions may be significantly out of date, and any more recent senses may be completely missing.
The state of being steady
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  1. The state of being steady
  2. The degree of stability
The ability to deal with difficult situations or to maintain a moral or intellectual position:
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  1. The ability to deal with difficult situations or to maintain a moral or intellectual position:
  2. Operative effectiveness or potency:
  3. Cogency or persuasiveness:
The state or quality of being sturdy.
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  1. The state or quality of being sturdy.
(Uncountable) The property of being sure, certainty.
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  1. (Uncountable) The property of being sure, certainty.
  2. (Uncountable) The property of being sure, deft, confident of ability.
Find another word for fastness. In this page you can discover 17 synonyms, antonyms, idiomatic expressions, and related words for fastness, like: swiftness, haste, rapidity, speed, firmness, hardness, security, soundness, stability, stableness and steadiness.