skillful

As an adjective skillful

is possessing skill.

As a noun action is

something done so as to accomplish a purpose.

As an interjection action is

demanding or signifying the start of something, usually an act or scene of a theatric performance.

As a verb action is

(management) to act on a request etc, in order to put it into effect.

As adjectives the difference between skillful and deceitful

is that skillful is possessing skill while deceitful is deliberately misleading or cheating.

As adjectives the difference between skillful and specialist

is that skillful is possessing skill while specialist is (british) specialised.

As a noun specialist is

someone who is an expert in, or devoted to, some specific branch of study or research.

Skillful is a related term of wily.

As adjectives the difference between skillful and wily

is that skillful is possessing skill while wily is sly, cunning, full of tricks.

As adjectives the difference between active and skillful

is that active is having the power or quality of acting; causing change; communicating action or motion; acting;—opposed to passive, that receives while skillful is possessing skill.

As a noun active

is a person or thing that is acting or capable of acting.

Rational is a related term of skillful.

As adjectives the difference between rational and skillful

is that rational is capable of reasoning while skillful is possessing skill.

As a noun rational

is (mathematics) a rational number: a number that can be expressed as the quotient of two integers.

Skillful is a related term of able.

As adjectives the difference between skillful and able

is that skillful is possessing skill while able is (obsolete|passive) easy to use .

As a verb able is

(obsolete) to make ready .

As a noun able is

a word that is used in place of the letter "a" during communication.

As adjectives the difference between skillful and artful

is that skillful is possessing skill while artful is performed with, or characterized by, art or skill.

Skillful is a related term of cunning.

As adjectives the difference between skillful and cunning

is that skillful is possessing skill while cunning is sly; crafty; clever in surreptitious behaviour.

As a noun cunning is

(obsolete) knowledge; learning; special knowledge (sometimes implying occult or magical knowledge).

As adjectives the difference between effective and skillful

is that effective is having the power to produce a required effect or effects while skillful is possessing skill.

As a noun effective

is a soldier fit for duty.