THESAURUS
Parenthesis
anastrophe, aside, broken thread, brokenness, chiasmus, disconnectedness, disconnection, discontinuance, discontinuation, discontinuity, discontinuousness, discreteness, disjunction, episode, fitfulness, hypallage, hyperbaton, hysteron proteron, incoherence, incompleteness, infix, injection, insert, insertion, insinuation, intercalation, interjection, interlineation, interlocution, intermittence, interpolation, introduction, irregularity, metastasis, metathesis, non sequitur, noncontinuance, nonlinearity, nonseriality, nonuniformity, obiter dictum, palindrome, remark, side remark, synchysis, tmesis, tossing-in
ROGET THESAURUS
Parenthesis
Discontinuity
N
discontinuity, disjunction, anacoluthon, interruption, break, fracture, flaw, fault, crack, cut, gap, solution of continuity, caesura, broken thread, parenthesis, episode, rhapsody, patchwork, intermission, alternation, dropping fire, discontinuous, unsuccessive, broken, interrupted, dicousu, disconnected, unconnected, discrete, disjunctive, fitful, spasmodic, desultory, intermitting, occasional, intermittent, alternate, recurrent, at intervals, by snatches, by jerks, by skips, by catches, by fits and starts, skippingly, per saltum, longo intervallo, like 'angel visits few and far between'.
Interval
N
interval, interspace, separation, break, gap, opening, hole, chasm, hiatus, caesura, interruption, interregnum, interstice, lacuna, cleft, mesh, crevice, chink, rime, creek, cranny, crack, chap, slit, fissure, scissure, rift, flaw, breach, rent, gash, cut, leak, dike, ha-ha, gorge, defile, ravine, canon, crevasse, abyss, abysm, gulf, inlet, frith, strait, gully, pass, furrow, abra, barranca, barranco, clove, gulch, notch, yawning gulf, hiatus maxime, hiatus valde deflendus, parenthesis, void, incompleteness, period, interim (time), with an interval, far between, breachy, rimose, rimulose, at intervals, longo intervallo.
Inversion
N
inversion, eversion, subversion, reversion, retroversion, introversion, contraposition, contrariety, reversal, turn of the tide, overturn, somersault, somerset, summerset, culbute, revulsion, pirouette, transposition, transposal, anastrophy, metastasis, hyperbaton, anastrophe, hysteron proteron, hypallage, synchysis, tmesis, parenthesis, metathesis, palindrome, pronation and supination, inverted, wrong side out, wrong side up, inside out, upside down, bottom upwards, keel upwards, supine, on one's head, topsy-turvy, sens dessus dessous, inverse, reverse, opposite, top heavy, inversely, hirdy-girdy, heels over head, head over heels.
Interposition
N
interposition, interjacence, intercurrence, intervenience, interlocation, interdigitation, interjection, interpolation, interlineation, interspersion, intercalation, interpenetration, permeation, infiltration, intervention, interference, intrusion, obtrusion, insinuation, insertion, dovetailing, embolism, intermediary, intermedium, go between, bodkin, intruder, interloper, parenthesis, episode, flyleaf, partition, septum, diaphragm, midriff, dissepiment, party wall, panel, room divider, halfway house, interjacent, intercurrent, intervenient, intervening, intermediate, intermediary, intercalary, interstitial, embolismal, parenthetical, episodic, mediterranean, intrusive, embosomed, merged, between, betwixt, twixt, among, amongst, amid, amidst, mid, midst, in the thick of, betwixt and between, sandwich-wise, parenthetically, obiter dictum.