hiccups, glitches, snags, hindrances, teething troubles, obstacles, hiccoughs, snafus, delays, kinks, glitch, impediments, setbacks, mishaps, hassles, inconveniences, problems, surprises, difficulties, interruptions, bumps, niggles, drawbacks, pitfalls, complications, bottlenecks, incongruities, pratfalls, disruption, giddyup, postponements, technicalities, irritations, quirks, wrangles, constraints, roadblocks, slippage, annoyances, spanners, misunderstandings, irregularity, gremlins, contrivances, disappointments, flaws, formalities, growing pains, breakdowns, tweaks, showstoppers, embarrassments, misgiving, modifications, hurdle, faults, shortcomings, stumbling block, disagreements, jitters, ambiguities, obstructions, controversies, lacunas, idiosyncrasies, hesitations, malfunctions, twists, jerkiness, complexities, awkwardness, flubs, palaver, traffic jam, screwup, tiffs, headaches, discomfort, challenges, bobbles, wobble, rigmarole, hullabaloo, sheepishness, misfire, deficiencies, holdups, troubles, squabbles, oddities, distractions, peculiarities, missteps, objections, infelicities, queues, hinderance, faux pas, lateness, upsets, blips, rudiments, hitch, breaks, loopholes, runs, exceptions, halts, hurdles, setups, stops, caveats, fixes

square knot