Synonyms of momentous in English:

momentous

adjective

  • a momentous decision
    [Antonyms] unimportant trivial insignificant
  • momentous or momentary? See momentary

    Definition of momentous in:

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    Word of the day antebellum
    Pronunciation: ˌantɪˈbɛləm
    adjective
    occurring or existing before a particular war…