proficiency (n.)
- ability
- ableness
- address
- adeptness
- adequacy
- adroitness
- advancement
- airmanship
- aptitude
- artfulness
- artisanship
- artistry
- bravura
- brilliance
- caliber
- capability
- capableness
- capacity
- cleverness
- command
- competence
- competency
- condition
- control
- coordination
- craft
- craftsmanship
- cunning
- deftness
- dexterity
- dextrousness
- diplomacy
- efficacy
- efficiency
- expertise
- expertness
- facility
- faculty
- finesse
- fitness
- flair
- genius
- grace
- grip
- handiness
- headway
- horsemanship
- ingeniousness
- ingenuity
- knack
- know-how
- march
- marksmanship
- mastership
- mastery
- maturity
- omniscience
- preparedness
- progress
- prowess
- qualification
- quickness
- readiness
- resource
- resourcefulness
- ripeness
- savoir-faire
- savvy
- seamanship
- seasoning
- skill
- skillfulness
- style
- sufficiency
- suitability
- suitableness
- susceptibility
- tact
- tactfulness
- talent
- technique
- tempering
- timing
- trim
- virtuosity
- wit
- wizardry
- workmanship
