momentous
3 synonyms and 2 antonyms for momentous, grouped by meaning and by how common each one is.
Adj — Of great importance, especially because of lasting consequences.
Synonyms
Everyday swaps
Common words most readers know — safe in any writing.
Rare, literary or technical
Precise, but they will stand out — check the sense before using one.
Antonyms
How to use momentous
The word patterns that sound natural to a native speaker.
Etymology
From "moment" in the older sense of "weight, importance," plus the adjective suffix "-ous."
Full origin of momentous →