Pocket Thesaurus
Antonyms of substantial
generous, extraordinary, solid, hefty, steady, valuable, large, sizable, massive, significant, big, consequential, serious, strong, meaningful, considerable, vast, material, abundant, bulky, durable, firm, heavy, key, momentous, plentiful, principal, sound, stable, stout, sturdy, tidy, weighty, worthwhile, goodly, heavyweight, major-league, superabundant, big-deal, well-built
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