Synonyms and Antonyms for significant

Synonyms:

• remarkable
• noteworthy
• operative
• probative
• significance
• portentous
• earthshaking
• epoch-making
• important
• prodigious
• evidential
• meaningful
• momentous
• evidentiary
• of import
• epochal
• profound
• large
• monumental
• probatory
• fundamental
• world-shattering
• world-shaking

Antonyms:

• insignificance
• meaningless
• insignificant
• unsound
• unwholesome

Synonyms:

• substantial
• considerable

Antonyms:

• inconsiderable
• insubstantiality

Synonyms:

• meaning
• meaningful
• pregnant

Antonyms:

• meaningless
• insubstantial
• inessential