substantial
adj.
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: material, real
adj.
of considerable importance, size, or worth
won by a substantial margin
Synonym: significant
adj.
of or relating to the real nature or essential elements of something
a substantial argument
Synonym: substantive
adj.
providing abundant nourishment
a hearty meal|good solid food|ate a substantial breakfast|four square meals a day
adj.
of good quality and condition; solidly built
a solid foundation|several substantial timber buildings
Synonym: solid, strong
adj.
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
Antonym: insubstantial