absorption, addition, ambages, anfractuosity, approximation, circuitousness, circumambages, circumbendibus, circumlocution, circumvolution, comedown, complexity, complexness, complication, convolution, crabbedness, crinkle, crinkling, debasement, decadence, decadency, declension, declination, decline, deformation, degeneracy, degenerateness, degeneration, degradation, demotion, depravation, depravedness, depreciation, derogation, descent, deterioration, devolution, differentiation, division, downtrend, downturn, downward mobility, downward trend, drop, dying, ebb, effeteness, embarrassment, engagement, enmeshment, entanglement, equation, evolution, extrapolation, fading, failing, failure, failure of nerve, fall, falling-off, flexuosity, flexuousness, implication, inclusion, integration, interpolation, intorsion, intricacy, intricateness, inversion, involvement, lapse, loss of tone, meander, meandering, multiplication, notation, perplexity, practice, proportion, ramification, reduction, regression, relation, retrocession, retrogradation, retrogression, rivulation, sinuation, sinuosity, sinuousness, slinkiness, slippage, slump, snakiness, subtlety, subtraction, tanglement, technicality, torsion, tortility, tortuosity, tortuousness, transformation, turning, twisting, undulation, wane, wave, waving, winding
, hard words, ambiguity, unintelligibleness, vagueness &c, inexactness, what d'ye call 'em, darkness of meaning, obscure, crabbed, involved, confused.
complexity, complexness, complexus, complication, implication, intricacy, intrication, perplexity, network, labyrinth, wilderness, jungle, involution
, raveling, entanglement, coil, sleave, tangled skein, knot, Gordian knot, wheels within wheels, kink, gnarl, knarl, webwork, difficulty, gnarled, knarled, complex, complexed, intricate, complicated, perplexed, involved, raveled, entangled, knotted, tangled, inextricable, irreducible.
numeration, numbering, pagination, tale, recension, enumeration, summation, reckoning, computation, supputation, calculation, calculus, algorithm, algorism, rhabdology, dactylonomy, measurement, statistics, arithmetic, analysis, algebra, geometry, analytical geometry, fluxions, differential calculus, integral calculus, infinitesimal calculus, calculus of differences, dead reckoning, muster, poll, census, capitation, roll call, recapitulation, account, notation, addition, subtraction, multiplication, division, rule of three, practice, equations, extraction of roots, reduction, involution
, evolution, estimation, approximation, interpolation, differentiation, integration, abacus, logometer, slide rule, slipstick, tallies, Napier's bones, calculating machine, difference engine, suan- pan, adding machine, cash register, electronic calculator, calculator, computer, arithmetician, calculator, abacist, algebraist, mathematician, statistician, geometer, programmer, accountant, auditor, numeral, numerical, arithmetical, analytic, algebraic, statistical, numerable, computable, calculable, commensurable, commensurate, incommensurable, incommensurate, innumerable, unfathomable, infinite, quantitatively, arithmetically, measurably, in numbers.
convolution, winding, convolution, involution
, circumvolution, wave, undulation, tortuosity, anfractuosity, sinuosity, sinuation, meandering, circuit, circumbendibus, twist, twirl, windings and turnings, ambages, torsion, inosculation, reticulation, rivulation, roughness, coil, roll, curl, buckle, spiral, helix, corkscrew, worm, volute, rundle, tendril, scollop, scallop, escalop, kink, ammonite, snakestone, serpent, eel, maze, labyrinth, knot, convoluted, winding, twisted, tortile, tortive, wavy, undated, undulatory, circling, snaky, snake-like, serpentine, serpent, anguill, vermiform, vermicular, mazy, tortuous, sinuous, flexuous, anfractuous, reclivate, rivulose, scolecoid, sigmoid, sigmoidal, spiriferous, spiroid, involved, intricate, complicated, perplexed, labyrinth, labyrinthic, labyrinthian, labyrinthine, peristaltic, daedalian, kinky, knotted, wreathy, frizzly, crepe, buckled, raveled, spiral, coiled, helical, cochleate, cochleous, screw-shaped, turbinated, turbiniform, in and out, round and round, a can of worms, Gordian knot.