quality vs difficulty

Other hyponyms of quality include appearance, visual aspect, attraction, attractiveness, clarity, clearness, uncloudedness, opacity, opaqueness, divisibility, ease, easiness, simpleness, simplicity, difficultness, burnability, combustibility, combustibleness, suitability, suitableness, arability, impressiveness, navigability, neediness, distressingness, painfulness, piquance, piquancy, piquantness, publicity, spinnability, ineptness, unsuitability, unsuitableness, protectiveness, nature, humanity, humanness, manhood, air, atmosphere, aura, excellence, ultimate, characteristic, salability, salableness, changeability, changeableness, changelessness, unchangeability, unchangeableness, unchangingness, sameness, difference, certainty, foregone conclusion, sure thing, probability, precariousness, uncertainness, uncertainty, factuality, factualness, counterfactuality, corporality, corporeality, materiality, physicalness, immateriality, incorporeality, particularity, specialness, generality, simpleness, simplicity, complexity, complexness, regularity, irregularity, unregularity, mobility, immobility, pleasantness, sweetness, unpleasantness, believability, credibility, credibleness, incredibility, incredibleness, logicality, logicalness, illogic, illogicality, illogicalness, inconsequence, naturalness, unnaturalness, vertu, virtu, wholesomeness, morbidity, morbidness, unwholesomeness, satisfactoriness, unsatisfactoriness, mundaneness, mundanity, ordinariness, extraordinariness, ethnicity, curiousness, foreignness, strangeness, nativeness, originality, unoriginality, correctness, rightness, incorrectness, wrongness, accuracy, truth, accuracy, inaccuracy, popularity, unpopularity, lawfulness, unlawfulness, elegance, elegance, inelegance, urbanity, comprehensibility, understandability, expressiveness, incomprehensibility, humaneness, inhumaneness, inhumanity, morality, immorality, amorality, divinity, holiness, sanctitude, sanctity, ideality, unholiness, parental quality, faithfulness, fidelity, infidelity, unfaithfulness, mundaneness, mundanity, sophistication, worldliness, naiveness, naivete, naivety, hardness, penetrability, perviousness, impenetrability, imperviousness, soapiness, fibrosity, fibrousness, directiveness, directivity, extremeness, closeness, stuffiness, adequacy, sufficiency, worth, ineptitude, worthlessness, good, goodness, bad, badness, fecundity, fruitfulness, aridity, barrenness, fruitlessness, usefulness, utility, inutility, unusefulness, uselessness, asset, plus, constructiveness, destructiveness, positiveness, positivism, positivity, negativeness, negativism, negativity, occidentalism, orientalism, power, powerfulness, ability, impotence, impotency, powerlessness, inability, unfitness, romance, romanticism, domesticity, boundlessness, infiniteness, infinitude, limitlessness, unboundedness, boundedness, finiteness, finitude, measurability, quantifiability, solubility, insolubility, stuff, hot stuff, voluptuousness, humor, humour, pathos, poignancy, tone, brachycephalism, brachycephaly, dolichocephalism, dolichocephaly, relativity, responsiveness, deadness, unresponsiveness, subjectivism, snootiness, ulteriority, memorability, woodiness, woodsiness, waxiness, indivisibility, immeasurability, minutia, injectiveness.