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Rigorous vs Gray - What's the difference?

rigorous | gray |

As an adjective rigorous

is manifesting, exercising, or favoring rigour; allowing no abatement or mitigation; scrupulously accurate; exact; strict; severe; relentless; as, a rigorous officer of justice; a rigorous execution of law; a rigorous definition or demonstration.

As a proper noun gray is

; originally a nickname for someone with a gray beard or hair.

rigorous

English

Alternative forms

* rigourous

Adjective

(en adjective)
  • Manifesting, exercising, or favoring rigour; allowing no abatement or mitigation; scrupulously accurate; exact; strict; severe; relentless; as, a rigorous officer of justice; a rigorous execution of law; a rigorous definition or demonstration.
  • *{{quote-magazine, date=2013-08-03, volume=408, issue=8847, magazine=(The Economist)
    • , title= Boundary problems , passage=Economics is a messy discipline: too fluid to be a science, too rigorous to be an art. Perhaps it is fitting that economists’ most-used metric, gross domestic product (GDP), is a tangle too. GDP measures the total value of output in an economic territory. Its apparent simplicity explains why it is scrutinised down to tenths of a percentage point every month.}}
  • Severe; intense; inclement; as, a rigorous winter.
  • Violent.

    • Synonyms

    * See also

    Antonyms

    * capricious

    gray

    English

    Alternative forms

    * grey (used in the UK and the Commonwealth and also in the US)

    Etymology 1

    From (etyl) ).

    Adjective

    (er) (spelled "grey" in the UK and the Commonwealth)
  • (label) Having a color somewhere between white and black, as the ash of an ember.
  • * Isaac Newton
  • (label) Dreary, gloomy.
  • *
  • (label) Having an indistinct, disputed or uncertain quality.
  • (label) Relating to older people.
  • * Ames
    • Usage notes
    A mnemonic for remembering which spelling is used where: gre'''y'' is the '''E'''nglish spelling, while ''gr'''a'''y'' is the '''A merican spelling. However, ''grey is also found in American English.
    Derived terms
    {{der3, battleship gray , gray area , graybeard , gray-haired , grayhound , grayness , gray ghost , gray matter}}

    Verb

    (en-verb) (spelled "grey" in the UK and the Commonwealth)
  • (label) To become gray.
  • (label) To cause to become gray.
  • To turn progressively older, in the context of the population of a geographic region.

    • Noun

  • (en noun) (spelled "grey" in the UK and the Commonwealth)
  • (label) An achromatic colour intermediate between black and white.
  • an extraterrestrial creature with grayish skin, bulbous black eyes, and an enlarged head.
  • A penny with a tail on both sides, used for cheating.Sidney J. Baker, The Australian Language , second edition, 1966, chapter XI section 3, page 243

    • See also

    *

    References

    Etymology 2

    Named after (Louis Harold Gray).

    Noun

    (en noun)
  • In the International System of Units, the derived unit of absorbed dose of radiation (radiation absorbed by a patient); one joule of energy absorbed per kilogram of the patient's mass. Symbol: Gy
    • Derived terms
    * kilogray
    See also
    *

    Anagrams

    * * English eponyms ----