2 synonym groups for Instruments

ribbons, loops, knots, arcs, curves, bends, flexes, inclinations, stoops, dips, nods, obeisances, reverences, salutes, curtsies, genuflections, inclines, sways, tilts, arches, flexures, sweeps, curls, twists, spirals, coils, rings, circles, hoops, whorls, helixes, volutes, scrolls, gyres, turns, revolutions, rotations, windings, meanders, zigzags, undulations, waves, ripples, billows, surges [x]

dimension, size, extent, magnitude, scale, gauge, assessment, evaluation,ification, appraisal, calculation, computation, mensuration, metric, estimate, valuation, survey, analysis, reading, determination, calibration, test, check, benchmark, criterion, standard, yardstick, indicator, index, parameter, specification, figure, amount, volume, capacity, weight, length, breadth, width, height, depth, span, range, scope, reach, proportion, ratio, degree, level [x]