especial

As an adjective especial

is of exceptional importance or significance.

As a verb different is

.

As adjectives the difference between perfect and especial

is that perfect is fitting its definition precisely while especial is of exceptional importance or significance.

As a noun perfect

is (grammar) the perfect tense, or a form in that tense.

As a verb perfect

is to make perfect; to improve or hone.

As adjectives the difference between especial and undefined

is that especial is of exceptional importance or significance while undefined is lacking a definition or value.

Vital is a related term of especial.

As adjectives the difference between vital and especial

is that vital is relating to, or characteristic of life while especial is of exceptional importance or significance.

Leading is a related term of especial.

As adjectives the difference between leading and especial

is that leading is providing guidance or direction while especial is of exceptional importance or significance.

As a verb leading

is .

As a noun leading

is an act by which one is led or guided or leading can be (typography) vertical space added between lines; line spacing.

Main is a related term of especial.

As a noun main

is .

As an adjective especial is

of exceptional importance or significance.

Appropriate is a related term of especial.

As adjectives the difference between appropriate and especial

is that appropriate is (obsolete) set apart for a particular use or person; reserved while especial is of exceptional importance or significance.

As a verb appropriate

is (archaic) to make suitable; to suit.

As adjectives the difference between notable and especial

is that notable is (obsolete) useful; profitable or notable can be worthy of notice; remarkable; memorable; noted or distinguished while especial is of exceptional importance or significance.

As a noun notable

is a person or thing of distinction.

Especial is a related term of critical.

As adjectives the difference between especial and critical

is that especial is of exceptional importance or significance while critical is inclined to find fault or criticize; fastidious; captious; censorious; exacting.

As a noun critical is

a critical value, factor, etc.

Respective is a related term of especial.

As adjectives the difference between respective and especial

is that respective is relating to particular persons or things, each to each; particular; own while especial is of exceptional importance or significance.