Example : Won by a substantial margin.

Synonyms : significant

Example : A substantial argument.

Synonyms : substantive

Example : The substantial world.
A mere dream, neither substantial nor practical.
The wind was violent and felt substantial enough to lean against.

Synonyms : material, real

Example : A hearty meal.
Good solid food.
Ate a substantial breakfast.
Four square meals a day.

Synonyms : hearty, satisfying, solid, square

Example : A solid foundation.
Several substantial timber buildings.

Synonyms : solid, strong

Example : An affluent banker.
A speculator flush with cash.
Not merely rich but loaded.
Moneyed aristocrats.
Wealthy corporations.
A substantial family.

Synonyms : affluent, flush, loaded, moneyed, wealthy