The difference between Insubstantial and Substantial

When used as adjectives, insubstantial means lacking substance, whereas substantial means having a substance.

Substantial is also noun with the meaning: anything having substance.

check bellow for the other definitions of Insubstantial and Substantial

Insubstantial as an adjective:

Lacking substance; not real or strong.

Examples:

"The bridge was insubstantial and would not safely carry a car."

Substantial as an adjective:

Having a substance; actually existing.

Examples:

"substantial life"
Substantial as an adjective:

Not imaginary; real; actual; true; veritable.
Substantial as an adjective:

Corporeal; material; firm.
Substantial as an adjective:

Having good substance; strong; stout; solid; firm.

Examples:

"usex substantial cloth"

"usex a substantial fence or wall"
Substantial as an adjective:

Possessed of goods or an estate; moderately wealthy.

Examples:

"usex a substantial freeholder"
Substantial as an adjective:

Large in size, quantity, or value; ample; significant.

Examples:

"usex He inherited a substantial amount of money from his uncle."

"usex A substantial number of people went to the event."
Substantial as an adjective:

Most important; essential.
Substantial as an adjective:

Satisfying; having sufficient substance to be nourishing or filling.

Examples:

"usex I don't just want a snack; I need something substantial."

"usex Teddy had a few crackers in his backpack, but he needed something more substantial if he was to survive a three-day trek."