substantial

(s) fairly large
- won by a substantial margin
significant,
(s) having a firm basis in reality and being therefore important, meaningful, or considerable
- substantial equivalents
substantive,
(a) having substance or capable of being treated as fact; not imaginary
- the substantial world
- a mere dream, neither substantial nor practical
- "most ponderous and substantial things"- Shakespeare
material, real,
(s) providing abundant nourishment
- a hearty meal
- good solid food
- ate a substantial breakfast
- four square meals a day
satisfying, hearty, square, solid,
(s) of good quality and condition; solidly built
- a solid foundation
- several substantial timber buildings
strong, solid,

significant substantive material real satisfying hearty square solid strong

insubstantial unsubstantial unreal

substantive

substantiality substantially substantialness