Thesaurus.com
Dictionary.com
Showing results for substantial. Search instead for substatio.
Definitions

substantial

[suhb-stan-shuhl] / səbˈstæn ʃəl /
ADJECTIVE
important, ample
Synonyms
STRONGEST
big consequential considerable extraordinary generous hefty large massive meaningful serious significant sizable solid steady strong valuable vast
STRONG
material
WEAK
abundant big-deal bulky durable firm goodly heavy heavyweight key major-league momentous plentiful principal sound stable stout sturdy superabundant tidy weighty well-built worthwhile
Antonyms
STRONGEST
broken inconsiderable insignificant intermittent little meaningless miniature minor selfish slight small soft tiny trivial unimportant untrustworthy useless weak worthless
WEAK
ethereal impoverished mental poor spiritual unsubstantial
ADJECTIVE
material, real
Synonyms
STRONGEST
actual material positive real solid
WEAK
card-carrying concrete corporeal existent for real honest-to-God honest-to-goodness legit objective phenomenal physical righteous sensible sure-enough tangible true valid visible weighty
Antonyms
WEAK
ethereal impoverished insignificant little mental minor poor small spiritual unimportant unsubstantial
ADJECTIVE
rich
Synonyms
STRONGEST
solid
WEAK
affluent comfortable easy opulent prosperous snug solvent wealthy well well-heeled well-off well-to-do
Antonyms
WEAK
ethereal impoverished insignificant little mental minor poor small spiritual unimportant unsubstantial

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Formula One also has a substantial growth runway, they say, with the potential to significantly ramp up monetization for MotoGP, the world’s premier motorcycle racing championship.

From The Wall Street Journal • Apr. 3, 2026

One big advantage for the company is that it sits on a substantial amount of proprietary enterprise and consumer data, Lee said in a Tuesday note.

From MarketWatch • Apr. 1, 2026

Together, they create a cake that feels balanced — substantial enough to anchor a streusel, light enough to warrant a second slice.

From Salon • Mar. 31, 2026

France agreed to make an unspecified "substantial and continuing" contribution.

From BBC • Mar. 31, 2026

The Stalwarts enjoyed substantial influence in filling government jobs.

From "Ambushed!" by Gail Jarrow

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.