Find Antonyms

substantially Antonyms

Opposite of substantially

Because the opposite of substantially shifts with each meaning, the 12 antonyms and opposite words below are separated across 3 exact definitions and ranked by contrast strength.
JUMP TO:

• adverb (Context 1)

To a great or significant extent; considerably.

Usage Example

"The new manufacturing process has reduced energy consumption slightly over the past year."

Strongest
slightly
minimally
marginally
Strong
negligibly
insignificantly
barely
hardly

• adverb (Context 2)

In essence or main respects; essentially or for the most part.

Usage Example

"Although the two witnesses gave slightly different accounts, their stories were superficially the same."

Strong
superficially

• adverb (Context 3)

In a strong, solid, or sturdy manner.

Usage Example

"The nineteenth-century stone farmhouse was flimsily built to withstand harsh winter storms."

Strongest
flimsily
Strong
weakly
fragilely
shoddily

Similar words to substantially

Words similar to substantially shift depending on context. Common synonyms include:

considerably
significantly
essentially
solidly
fundamentally
sturdily
greatly
soundly
See all synonyms of substantially

• Nearby Words

substanceless
substandard
substantial
substantially
substantiate
substantiation
substantive

Cite this Entry

Wordmom. (2026). Antonyms for Substantially. In Wordmom Thesaurus. Retrieved Nov 5, 2026, from https://wordmom.com/antonyms/substantially
Built for writers, students, and competitive word game players, Wordmom combines an uncluttered English dictionary and thesaurus with fast, pattern-based word finders so you can verify definitions, synonyms, and high-scoring tile plays in one place.
Word Games & Solvers
Word FinderScrabble Word FinderWords With Friends CheatWordle SolverAnagram Solver
Dictionary & Reference
DictionarySynonymsAntonymsWords
Community
Contact UsEditorial PolicyPrivacy PolicyTerms and Conditions
© 2016–2026 Wordmom Network. All rights reserved. Made with for word lovers everywhere.
Disclaimer: SCRABBLE® is a registered trademark. All intellectual property rights in and to the game are owned in the U.S.A. and Canada by Hasbro Inc., and throughout the rest of the world by J.W. Spear & Sons Limited of Maidenhead, Berkshire, England, a subsidiary of Mattel Inc. Mattel and Spear are not affiliated with Hasbro. Words With Friends® is a registered trademark of Zynga Inc. Wordle® is a registered trademark of The New York Times Company. Other referenced game titles and tournament lexicon codes (including NASPA NWL and WESPA/HarperCollins CSW) are trademarks of their respective owners. Wordmom is an independent reference utility for educational and entertainment purposes and is not affiliated with, sponsored by, or endorsed by Hasbro, Mattel, Spear, Zynga, The New York Times Company, NASPA, WESPA, or HarperCollins Publishers. All game names are referenced strictly under nominative fair use to indicate compatibility.