The difference between Special and Usual

When used as adjectives, special means distinguished by a unique or unusual quality, whereas usual means most commonly occurring.

Special is also noun with the meaning: a reduction in consumer cost (usually for a limited time) for items or services rendered.

Special is also verb with the meaning: to supervise a patient one-on-one.

check bellow for the other definitions of Special and Usual

Special as an adjective:

Distinguished by a unique or unusual quality.

Examples:

"a special episode of a television series"
Special as an adjective:

Of particular personal interest or value; dear; beloved.

Examples:

"Everyone is special to someone."
Special as an adjective (euphemistic):

Of or related to learning or intellectual disabilities.

Examples:

"[[special education special education]]"

"He goes to a special school."
Special as an adjective:

Constituting or relating to a species.

Examples:

"The seven dark spots is a special property unique to ''Coccinella septempunctata''."
Special as an adjective:

Chief in excellence.
Special as an adjective (military):

Of or related to special forces.

Special as a noun:

A reduction in consumer cost (usually for a limited time) for items or services rendered.

Examples:

"We're running a special on turkey for Thanksgiving."
Special as a noun:

One of a rotation of meals systematically offered for a lower price at a restaurant.

Examples:

"Today's special is our tuna melt on rye."
Special as a noun (broadcasting):

Unusual or exceptional episode of a series.

Examples:

"Did you see the Christmas special?"
Special as a noun (British, colloquial):

A special constable.
Special as a noun:

Anything that is not according to normal practice, plan, or schedule, as an unscheduled run of transportation that is normally scheduled.

Examples:

"Thousands came to see the special that carried the President's coffin."
Special as a noun (video games):

Special move.
Special as a noun:

Any unlicensed medicine produced or obtained for a specific individual patient.

Usual as an adjective:

Most commonly occurring; typical.

Examples:

"The preference of a boy to a girl is a usual occurrence in some parts of China."

"It is becoming more usual these days to rear children as bilingual."