· of considerable importance, size, or worth; "won by a substantial margin"

Synonym(s): significant

· of or relating to the real nature or essential elements of something; "a substantial argument"

Synonym(s): substantive

· having substance or capable of being treated as fact; not imaginary; "the substantial world"; "a mere dream, neither substantial nor practical"; "The wind was violent and felt substantial enough to lean against"

Synonym(s): real, material

Antonym(s): insubstantial

· providing abundant nourishment; "a hearty meal"; "good solid food"; "ate a substantial breakfast"; "four square meals a day"

Synonym(s): hearty, satisfying, solid, square

· of good quality and condition; solidly built; "a solid foundation"; "several substantial timber buildings"

Synonym(s): solid, strong

· having an abundant supply of money or possessions of value; "an affluent banker"; "a speculator flush with cash"; "not merely rich but loaded"; "moneyed aristocrats"; "wealthy corporations"; "a substantial family"

Synonym(s): affluent, flush, loaded, moneyed, wealthy