The difference between Insane and Lunatic

When used as adjectives, insane means exhibiting unsoundness or disorder of mind, whereas lunatic means crazed, mad, insane, demented.

Lunatic is also noun with the meaning: an insane person.

check bellow for the other definitions of Insane and Lunatic

Insane as an adjective:

Exhibiting unsoundness or disorder of mind; not sane; mad

Examples:

"synonyms: delirious distracted"
Insane as an adjective:

Used by, or appropriated to, insane persons

Examples:

"an insane hospital"

"an insane asylum"
Insane as an adjective:

Causing insanity or madness.
Insane as an adjective:

Characterized by insanity or the utmost folly; ridiculous; impractical

Examples:

"an insane plan"

"an insane amount of money"