| Main Entry: | |
| Part of Speech: | adjective |
| Definition: | important, ample |
| Synonyms: | abundant, big, big-deal, bulky, consequential, considerable, durable, extraordinary, firm, generous, goodly, heavy, heavyweight, hefty, key, large, major-league, massive, material, meaningful, momentous, plentiful, principal, serious, significant, sizable, solid, sound, stable, steady, stout, strong, sturdy, superabundant, tidy, valuable, vast, weighty, well-built, worthwhile |
| Notes: | substantial means considerable or sizeable; substantive means actual or firm |
| Antonyms: | insignificant, little, minor, small, unimportant, unsubstantial |