proficiency

As a noun proficiency is

ability, skill, competence.

Inventiveness is a related term of proficiency.

As nouns the difference between inventiveness and proficiency

is that inventiveness is the quality of being inventive; the faculty of inventing while proficiency is ability, skill, competence.

Brilliancy is a synonym of proficiency.

As nouns the difference between brilliancy and proficiency

is that brilliancy is a shining quality; brilliance while proficiency is ability, skill, competence.

Fluency is a related term of proficiency.

As nouns the difference between fluency and proficiency

is that fluency is the quality of smoothness of flow while proficiency is ability, skill, competence.

Proficiency is a related term of greatness.

As nouns the difference between proficiency and greatness

is that proficiency is ability, skill, competence while greatness is the state, condition, or quality of being great; as, greatness of size, greatness of mind, power, etc.

Acuity is a related term of proficiency.

As nouns the difference between acuity and proficiency

is that acuity is sharpness or acuteness, as of a needle, wit, etc while proficiency is ability, skill, competence.

As nouns the difference between attainment and proficiency

is that attainment is the act of attaining; the act of arriving at or reaching; the act of obtaining by exertion or effort while proficiency is ability, skill, competence.

Resourcefulness is a related term of proficiency.

As nouns the difference between resourcefulness and proficiency

is that resourcefulness is the ability to cope with difficult situations, or unusual problems while proficiency is ability, skill, competence.

Intelligence is a related term of proficiency.

As nouns the difference between intelligence and proficiency

is that intelligence is (uncountable) capacity of mind, especially to understand principles, truths, facts or meanings, acquire knowledge, and apply it to practice; the ability to learn and comprehend while proficiency is ability, skill, competence.