skillfulness(n = noun.cognition) - the state of being cognitively skillful;
is a kind of state
has particulars: expertise, expertness, handiness, coordination, versatility, command, control, mastery, adeptness, adroitness, deftness, facility, quickness, fluency, proficiency, technique, efficiency
Antonym: unskillfulness
Derived form adjective skillful₁

N  skill, skillfulness, address, dexterity, dexterousness, adroitness, expertness, proficiency, competence, technical competence, craft, callidity, facility, knack, trick, sleight, mastery, mastership, excellence, panurgy, ambidexterity, ambidextrousness, sleight of hand, seamanship, airmanship, marksmanship, horsemanship, rope-dancing, accomplishment, acquirement, attainment, art, science, technicality, technology, practical knowledge, technical knowledge, knowledge of the world, world wisdom, savoir faire, tact, mother wit, discretion, finesse, craftiness, management, self-help, cleverness, talent, ability, ingenuity, capacity, parts, talents, faculty, endowment, forte, turn, gift, genius, intelligence, sharpness, readiness, invention, aptness, aptitude, turn for, capacity for, genius for, felicity, capability, curiosa felicitas, qualification, habilitation, proficient, masterpiece, coup de maitre, chef d'euvre, tour de force, good stroke, skillful, dexterous, adroit, expert, apt, handy, quick, deft, ready, gain, slick, smart, proficient, good at, up to, at home in, master of, a good hand at, au fait, thoroughbred, masterly, crack, accomplished, conversant, experienced, practiced, skilled, hackneyed, up in, well up in, in practice, in proper cue, competent, efficient, qualified, capable, fitted, fit for, up to the mark, trained, initiated, prepared, primed, finished, clever, cute, able, ingenious, felicitous, gifted, talented, endowed, inventive, shrewd, sharp, on the ball, cunning, alive to, up to snuff, not to be caught with chaff, discreet, neat-handed, fine-fingered, nimble-fingered, ambidextrous, sure- footed, cut out for, fitted for, technical, artistic, scientific, daedalian, shipshape, workman- like, business-like, statesman-like, skillfully, well, artistically, with skill, with consummate skill, secundum artem, suo Marte, to the best of one's abilities, ars celare artem, artes honorabit, celui qui veut celui-la peut, c'est une grande habilite que de savoir cacher son, expertus metuit, es bildet ein Talent sich in der Stille sich ein C, heart to conceive, the understanding to direct, or the hand to execute, if you have lemons, make lemonade.