effective

As adjectives the difference between effective and optimal

is that effective is having the power to produce a required effect or effects while optimal is the best, most favourable or desirable, especially under some restriction.

As a noun effective

is a soldier fit for duty.

As nouns the difference between expertise and effective

is that expertise is great skill or knowledge in a particular field or hobby while effective is a soldier fit for duty.

As an adjective effective is

having the power to produce a required effect or effects.

As adjectives the difference between substantive and effective

is that substantive is of the essence or essential element of a thing; as, "substantive information" while effective is having the power to produce a required effect or effects.

As nouns the difference between substantive and effective

is that substantive is a word that names a person, place, thing or idea; a noun (sensu stricto while effective is a soldier fit for duty.

Fitted is a related term of effective.

As adjectives the difference between fitted and effective

is that fitted is incorporating all of the fittings into connected units while effective is having the power to produce a required effect or effects.

As a verb fitted

is (fit) (to tailor, change size).

As a noun effective is

(military) a soldier fit for duty.

As an adjective effective

is having the power to produce a required effect or effects.

As a noun effective

is (military) a soldier fit for duty.

As a verb improve is

(lb) to make (something) better; to increase the value or productivity (of something).

As adjectives the difference between effective and important

is that effective is having the power to produce a required effect or effects while important is having relevant and crucial value.

As a noun effective

is a soldier fit for duty.

As adjectives the difference between effective and operational

is that effective is having the power to produce a required effect or effects while operational is of or relating to operations, especially military operations.

As a noun effective

is (military) a soldier fit for duty.

As nouns the difference between impact and effective

is that impact is the striking of one body against another; collision while effective is a soldier fit for duty.

As a verb impact

is to compress; to compact; to press or pack together.

As an adjective effective is

having the power to produce a required effect or effects.

As adjectives the difference between effective and professional

is that effective is having the power to produce a required effect or effects while professional is of, pertaining to, or in accordance with the (usually high) standards of a profession.

As nouns the difference between effective and professional

is that effective is a soldier fit for duty while professional is a person who belongs to a profession.

As adjectives the difference between effective and aesthetic

is that effective is having the power to produce a required effect or effects while aesthetic is concerned with beauty, artistic impact, or appearance.

As nouns the difference between effective and aesthetic

is that effective is a soldier fit for duty while aesthetic is the study of art or beauty.