1 syllable:
-decked, -necked, -sect, becht, becked, brecht, checked, chek-dt, decked, dsect, fecht, fecked, flecked, hecht, hect-, jtekt, kecked, knecht, necked, pecht, pecked, precht, recht, recked, recte, schlecht, sect, secte, seked, sekte, snecked, specht, specked, speckt, spect, trekked, v-necked, wecht, wrecked

2 syllables:
advect, affect, albrecht, allect, arrect, aspect, atrecht, aufrecht, bedecked, bedeckt, bisect, bullnecked, cilect, collect, collecte, complect, confect, conject, connect, contect, convect, corect, correct, crosschecked, defect, defekt, deflect, deject, deregt, despect, detect, detrect, direct, directe, dissect, dordrecht, effect, eject, elect, enfect, entrecte, erect, exect, expect, exsect, flyspecked, half-decked, hambrecht, henpecked, humect, infect, inflect, inject, insecte, insekt, inspect, invect, kinect, konfekt, moordrecht, neglect, object, obtect, pandect, perfect, perfekt, porrect, prefect, prelect, pro-ject, project, protect, provect, rechecked, rednecked, refect, reflect, reject, resect, respect, rupprecht, schiltknecht, select, senkrecht, spot-checked, subject, subnect, suspect, suspekt, traject, tranect, transect, trisect, unchecked, unecht, utecht, utrecht, vpec-t, wrynecked

3 syllables:
5select, acrolect, amish sect, analect, anderlecht, architect, architecte, architekt, artilect, aufgeregt, barenecked, basilect, bitconnect, bottlenecked, by-respect, caverject, child neglect, circumflect, circumspect, codirect, counterchecked, cross-connect, deselect, dialect, dialecte, dialekt, disaffect, disconnect, disinfect, disrespect, double-checked, double-decked, droste effect, dr disrespect, ethnolect, freshdirect, genderlect, genuflect, hemisect, incorrect, indirect, intellect, interject, intersect, intertect, introspect, in effect, jetdirect, leberecht, liege subject, mesolect, misaffect, miscorrect, misdirect, multisect, non-direct, nondirect, nonelect, note-perfect, parkitect, past perfect, pluperfect, predilect, preelect, preerect, preselect, privatrecht, quadrisect, quantconnect, quickselect, rape suspect, re-collect, re-elect, re-erect, recollect, reconnect, redirect, reelect, reerect, reinfect, reinspect, reselect, resurrect, retrospect, rubbernecked, schildknecht, self-correct, self-neglect, self-respect, semierect, short subject, side-effect, side effect, skin effect, sound effect, stage direct, stage effect, starchitect, suberect, take effect, topolect, transperfect, turtlenecked, uncorrect, undirect, unerect, unperfect, unprotect, unrespect, unselect, unsuspect, venesect, vivisect, word-perfect, wreckx-n-effect, write-protect

4 syllables:
after-effect, aftereffect, autocorrect, coattails effect, dopplereffekt, doppler effect, eyebuydirect, future perfect, greenhouse effect, hypercorrect, idiolect, incircumspect, interconnect, introselect, in that respect, law of effect, letter-perfect, microinject, min dialect, misrecollect, murder suspect, openconnect, oranjegekte, over-correct, overaffect, overcorrect, overprotect, photoeffect, picture-perfect, pinnatisect, present perfect, preterperfect, semi-erect, sociolect, special effect, subdialect, superinfect, superinspect, teleconnect, tigerdirect, transdialect, uncircumspect, unwind-protect, urheberrecht, willful neglect, with all respect, wu dialect, yue dialect

5 syllables:
1-800-collect, beijing dialect, bipinnatisect, flemish dialect, landscape architect, president-elect, preterimperfect, preterpluperfect, progressive aspect, robbery suspect, sciencedirect, shanghai dialect, ubisoft connect, visual aspect

6 syllables:
cantonese dialect, mandarin dialect

7 syllables:
triboelectric effect