dilemma, conundrum, shortcoming, issue, quandary, difficulties, trouble, concern, woes, impediment, headache, bugbear, misconception, stumbling block, predicament, obstacle, flaw, bottleneck, drawback, mess, imbalance, paradox, pitfall, shortage, challenge, deficiencies, malady, bugaboo, discrepancy, mistake, misperception, culprit, riddle, ills, glitch, fix, silver bullet, gripe, constraint, inequity, situation, mismatch, pet peeve, misunderstanding, threat, symptom, achilles heel, complication, thing, magic bullet, phenomenon, danger, question, hurdle, hindrance, menace, disparity, snafu, downfalls, disadvantage, worry, affliction, scourge, crisis, preoccupation, hinderance, downsides, fallacy, shortfalls, lacuna, disconnect, inconsistency, panacea, epidemic, peeve, ramifications, maldistribution, anomaly, nightmare, teething troubles, disagreement, hazard, phobia, overcrowding, scarcity, matter, annoyance, weaknesses, consequences, inefficiency, nuisance, misnomer, reason, irritation, incompatibility, irritant, crunch, defect, need, plagues, factor, screwup, prohlem, problems, prob, ques, difficulty, prohlems, drawbacks, issues, questions, desideratum, caveat, risk, conflict, study, exercise, principle, discourse, lesson, project, unstructured, case, challenging, learning, bicultural, fable, nonaggressive, product, unsupervised, competency, goal

acrostic, balance-of-payments problem, brain-teaser, case, conundrum, crossword, crossword puzzle, enigma, gordian knot, homework problem, matter, pons asinorum, poser, puzzle, puzzler, race problem, rebus, riddle, stumper, toughie, word square

., acting out, additional, admit, aggravation, algorithm, algorithmic program, algorithmic rule, allude, answer, appear, application, approach, arithmetically, aspect, asthenopia, attack, at ease, at length, background, background knowledge, baffling, balance-of-payments problem, begin, biotechnology, boggle, bottom-up, brain-teaser, brainstorm, brainstorming, brilliantly, brooding, calculation, capacitate, case, central, cerebral, clear, clew, clue, cogent, come to grips, complicated, computation, computationally, conclusively, consciousness, consideration, construction, contrivance, conundrum, convergent thinker, convergent thinking, creatively, cue, deal, deride, determinate, diagnose, different, discouraged, divergent thinker, down-to-earth, elementary, elimination, enigma, escapism, exacerbation, example, exercise, eyestrain, facet, facile, figure out, figuring, finitely, generalized, get to grips, go-slow, gordian knot, go about, grass roots, harmoniously, head-on, heuristic, heuristic program, heuristic rule, high-level language, homeless, homework problem, ineffectively, ingenious, insoluble, insolvable, inspiration, in troublep, job-control language, jurisprudence, knotty, lack, lateral thinking, laugh away, laugh off, lick, magnitude, matter, matter-of-fact, meanwhile, multiplex, mushroom, mystifier, name, nasty, now, on the face of it, overshadow, oversimplify, painless, paradigm, pass away, pensiveness, plain sailing, plan of attack, plug, plug away, pons asinorum, poser, potential, pragmatic, predicate, press, problematically, problem solver, problem solving, proficiently, props, puzzle, puzzler, puzzle out, race problem, reasoning by elimination, reckoning, recognition, recondite, reduce, research effort, resolution, result, riddle, root, science, separate, separatism, short, silver bullet, simple, skill, skirt, snorter, solution, solve, solvent, solver, solving, sound, speedy, squarely, sticker, still, stuck, stump, stumper, teaser, technical, theologically, theoretically, thereof, top-down, toughie, uncomplicated, uncontrolled, urinary retention, vex, view, viewpoint, well, work, workshop, work out, xanthoma

difficulty, head, question

job, trouble