1 syllable:
-backed, achte, backed, blacked, bracht, brachte, bract, clacked, cracked, dachte, fact, flacked, fracht, fract, gackt, gracht, hacked, jacht, jacked, knacked, kracht, lacked, lact-, nackt, pacht, packed, packt, pact, pacte, pracht, quacked, qvacked, racked, rakht, sacked, schacht, schlacht, shacked, slacked, smacked, snacked, stacked, stacte, tacked, tact, takht, tracht, trachte, tracked, tract, trakt, wacked, whacked, wracked, yacked, yakked, zacht

2 syllables:
abstract, adact, air-slacked, anact, attacked, attract, auftakt, backpacked, backtracked, barebacked, betracht, blackjacked, bunch-backed, bushwhacked, car-jacked, carjacked, cei-pact, cextract, close-packed, coact, compact, confract, contact, contract, crookbacked, deact, detract, didact, diffract, distract, eintracht, en-tact, enact, entracte, epact, ex'act, exact, exakt, extract, fast-tracked, finchbacked, galact, galact-, gebracht, gedacht, gedact, genpact, gobsmacked, half-cracked, half-tracked, hardbacked, high-backed, highjacked, hijacked, humpbacked, hunchbacked, impact, infract, intact, in fact, jam-packed, jampacked, kompakt, kontakt, kontakte, low-backed, lute-backed, medfact, mossbacked, nerve tract, olfact, one-act, outact, peract, play-act, playact, postact, postfact, preact, prepacked, protract, ransacked, re-act, react, redact, refract, repacked, retract, roach-backed, rofact, rollbacked, round-backed, sanakht, sidetracked, skyjacked, stiff-backed, straight-backed, subact, substract, subtract, sway-backed, swaybacked, switchbacked, tarmacked, thumbtacked, tocktact, transact, unbacked, unfact, unhacked, unpacked, unslacked, untracked, vkontakte, well-stacked, wisecracked

3 syllables:
abreact, acetract, action-packed, anteact, antefact, artefact, artifact, asset-backed, autofact, benefact, biofact, broken-backed, camel-backed, cataphract, cateract, chain-react, contrafact, counteract, cross-react, ecofact, edifact, eye contact, fly contact, fraud in fact, full-contact, fullcontact, geofact, high-impact, huckle-backed, imfact, incoact, inexact, interact, ladder-backed, lobster-backed, medivaced, medivacked, mortgage-backed, non-contract, noncontract, optic tract, overact, paperbacked, piggybacked, pontefract, precontact, precontract, quarterbacked, razor-backed, re-enact, recontact, reenact, retroact, retrofract, rotaract, saddle-backed, saddlebacked, shadowpact, smart contract, spiny-backed, spiritpact, subcontract, tadelakt, tesseract, underact, unexact, vacuum-packed, ventifact

4 syllables:
accomplished fact, almond extract, autodidact, bataireacht, breach of contract, cola extract, counterattacked, digestive tract, enviropact, finding of fact, fluidextract, futures contract, gabriel macht, genshin impact, in point of fact, labor contract, lemon extract, marriage contract, matter-of-fact, matter of fact, oral contract, output contract, overreact, politifact, purchase contract, quasi-contract, quasi contract, question of fact, semi-abstract, semiabstract, semicompact, service contract, social contract, special contract, suicide pact, underreact

5 syllables:
attorney-in-fact, caterpillar-tracked, contrary to fact, employment contract, gambling contract, requirements contract, term of a contract, urinary tract, vanilla extract

6 syllables:
alimentary tract, as a matter of fact, bilateral contract, conditional contract, electrical contact, respiratory tract

7 syllables:
aleatory contract, gastrointestinal tract, unilateral contract

8 syllables:
accessory after the fact, accessory before the fact

1 syllable:
wrapped, rapt, kept, strapped, apt, trapped, slapped, chapped, capped, napped, tapped, snapped, scrapped

2 syllables:
inapt, adapt, untapped, coapt, enwrapped, unmapped, unwrapped

3 syllables:
readapt