2 letters:
ot

3 letters:
cot, dot, got, hot, jot, kot, lat, lot, not, ott, pot, sot, tot, wat

4 letters:
.dot, alot, baht, blot, bott, clot, cott, dott, gaut, gott, haut, hott, khat, knot, kott, laut, lott, mott, nott, otte, plot, pott, rott, scot, shot, slot, snot, spot, swat, szot, taut, trot, watt, yott

5 letters:
-spot, .scot, aahed, abott, aetat, akb48, aldat, allot, annot, arcot, ascot, aught, a lot, barat, batat, bc548, begot, berat, besot, bhatt, blott, bnk48, botte, braat, braut, brott, butat, c-dot, capot, carot, caute, chaat, chott, claut, clott, cotte, croat, culot, d-dot, da'at, dagat, datte, del48, demat, detat, difot, draht, drott, espot, fahed, firat, flaut, flott, gnz48, graat, grott, gspot, hayat, herat, hkt48, hotte, hplot, ifobt, impot, indot, jkt48, kapot, kiaat, knott, kotte, lapot, losat, lotte, mahat, maute, minot, mitat, mnl48, motte, murat, ngt48, njdot, notte, nrodt, ofwat, omdat, ought, patat, payot, plaat, plaut, plott, potte, praat, prot-, quate, rahat, rajat, rakat, robot, rosat, rotte, sadat, scdot, scott, scrot, serat, sgo48, shott, ske48, slott, snh48, sopot, splot, spott, sprot, squat, staat, staut, stott, stu48, surat, swatt, szott, t-dot, thaat, tobot, tokat, tpe48, traut, trott, ungot, voght, waadt, watte, wydot, yacht, zakat

6 letters:
ablaut, abwatt, agyaat, alcott, anlaut, ararat, arnaut, ascott, asquat, assaut, aucott, avocat, ayotte, bampot, beblot, bespot, bharat, bina48, bought, bowpot, boycot, buryat, cannot, caught, caviat, cedrat, demott, didcot, diquat, dought, escaut, f-spot, faught, ferrat, firlot, flotte, forgot, fought, g-shot, g-spot, grotte, guizot, haught, hiwatt, hotpot, hublot, ic-pot, inkpot, jampot, kiryat, kompot, kurrat, laagte, labatt, lamott, loquat, malott, mandat, mangat, margat, mascot, massat, mought, naught, nought, nunaat, ocelot, oviatt, ozelot, pageot, piraat, poinot, qiryat, raught, refaat, reshot, rought, sabaat, salaat, sampot, sangat, schott, seshat, settat, sexpot, sought, sprott, squat', squatt, swatte, taught, td mot, teapot, tinpot, tomaat, umlaut, unknot, unshot, upshot, vaught, vought, waught

7 letters:
aasiaat, abought, advokat, aeronat, airwatt, akb0048, amanaat, angelot, apricot, auslaut, autobot, backlot, bagehot, bagshot, baharat, barakat, bibelot, bigshot, bowknot, bowshot, boycott, bradsot, brought, cadotte, calicot, calotte, camelot, candiot, carotte, claught, cocotte, culotte, cumshot, cypriot, dashpot, dogtrot, dynadot, earshot, elfshot, elispot, eyeshot, eyespot, feedlot, fft mot, firepot, flyswat, forswat, fraught, fusspot, galipot, garotte, gluepot, godslot, griotte, gunshot, gutshot, hainaut, harakat, haricot, hipshot, hot-pot, hotshot, hotspot, hubspot, hutspot, ijaazat, ink-pot, inkblot, jackpot, javelot, job lot, kamelot, karotte, keyslot, lamotte, lezotte, lizotte, mailbot, majorat, marcott, marotte, marryat, matagot, mayotte, may not, meritot, morisot, mugshot, natkhat, nelipot, odd-lot, oneshot, outshot, penndot, perrott, picotte, pilotte, pisspot, potshot, ratatat, red-hot, rimshot, rooikat, salawat, saligot, sandlot, sanglot, schaadt, schlott, schrodt, schrott, seroxat, sicotte, simblot, stewpot, sunspot, talipot, tfthaot, thaught, thought, tin-pot, topknot, tosafot, tosspot, try-pot, umerkot, unbegot, valotte, vancott, washpot, westcot, whatnot, woodlot, wrought, wyandot, zantiot

8 letters:
ach-laut, advocaat, aeroflot, aeronaut, aquanaut, argonaut, arraught, asymptot, bagalkot, bankrott, barbotte, basharat, bell cot, besought, betaught, big shot, birdshot, biscotte, bodhisat, boitnott, bombhaat, boughpot, bow-knot, browspot, buckshot, bullshot, cachalot, cachepot, cagnotte, chamotte, cj da gt, crackpot, crockpot, culottes, curve448, dash-pot, deadshot, deepspot, ear-shot, endicott, entrepot, eschalot, eye-spot, fleshpot, foreshot, fox-trot, gallipot, gamespot, gigawatt, goldspot, hailshot, have got, headshot, helfgott, hitchbot, hochepot, holeshot, honeypot, hot-shot, hot-spot, hotchpot, huguenot, hurrahed, hydropot, ich-laut, jog-trot, jog trot, khambhat, kilowatt, lancelot, limequat, longshot, mailshot, marcotte, mariotte, marmotte, mascotte, mcnaught, megawatt, microdot, misbegot, mishcatt, moonshot, mug shot, must not, nadeshot, nanowatt, oceanaut, one-shot, one shot, openshot, overshot, packshot, paintpot, paraquat, persicot, quikclot, retaught, robonaut, roulotte, saucepot, set shot, shit-hot, six-spot, slapshot, slashdot, slipknot, snapshot, soufflot, spamalot, stamppot, stinkpot, stockpot, straught, superdot, surmulot, ten-spot, terawatt, timeslot, turcotte, two-shot, two-spot, unbought, uncaught, unfought, unsought, untaught, upcaught, wastelot, waterpot, westcott

9 letters:
aldershot, argonaute, astronaut, aydelotte, bank shot, bethought, bewrought, bird shot, blackspot, blindspot, bloodshot, boursicot, brideknot, bridgepot, case-shot, case shot, champawat, cheapshot, chip shot, chop shot, coffeepot, coin slot, concordat, cormoraut, cosmonaut, craquelot, crock-pot, cuisinart, cybernaut, do-naught, drop shot, duck shot, dunk shot, extraught, five-spot, flat knot, flowerpot, foul shot, four-spot, gibelotte, golf shot, grammelot, grapeshot, grayshott, greenshot, guillotte, hadramaut, halo spot, hectowatt, high spot, hook shot, hydronaut, interknot, internaut, intronaut, inwrought, jump shot, kennecott, konsultat, kosmonaut, launcelot, liselotte, long shot, loop knot, love knot, magistrat, mail slot, methought, microwatt, milliwatt, mistaught, monkeypot, monserrat, moon shot, nefermaat, nightshot, nightspot, nine-spot, onslaught, outfought, pepperpot, pine knot, polka-dot, polka dot, quackshot, reef knot, rethought, riociguat, shallotte, slingshot, slungshot, snap-shot, soft spot, taikonaut, tehkikaat, thinkspot, time slot, unfraught, unthought, unwrought, upbrought, verneshot, vitelotte, volkstaat, weak spot, white-pot, whole lot, wyandotte

10 letters:
alia bhatt, an/prc-148, baking hot, bernadotte, bestraught, black knot, blind spot, blood-clot, blood clot, blood knot, bouillotte, breastknot, chamberpot, chimneypot, coffee-pot, cornershot, crack shot, cyber-shot, direktorat, distraught, eight-spot, fearnaught, fearnought, forty-spot, gastronaut, globe-trot, hadhramaut, internaute, juggernaut, lieselotte, liver spot, masse shot, mezzanotte, misthought, miswrought, monkey-pot, montserrat, mu'allaqat, mukhabarat, nouakchott, on the dot, outthought, outwrought, overbought, overraught, pepper pot, pichenotte, pitch shot, pivot shot, rifle-shot, rifle shot, round shot, save-a-lot, scoop shot, screenshot, seven-spot, sight-shot, silverspot, staalplaat, superyacht, sword knot, three-spot, vacant lot, vericiguat, wyandottes

11 letters:
andvaranaut, baiju bhatt, barrel knot, beauty spot, build-a-lot, caillebotte, checkerspot, chlormequat, countershot, dear-bought, diddlysquat, dreadnaught, dreadnought, eurojackpot, fishtronaut, flight-shot, forethought, forstraught, freethought, french knot, granny knot, handwrought, hard-fought, indian shot, lobster pot, magnitizdat, megadrought, melting pot, on-the-spot, overfraught, overthought, overwrought, parking lot, plague spot, rechtsstaat, rising trot, sansculotte, scattershot, self-taught, sesamstraat, single-shot, square knot, tennis shot, the sandlot, thoughtspot, troubleshot, turkey-trot, turkey trot, underbought, watson-watt, yellow spot, zuckerwatte

12 letters:
aforethought, afterthought, aleph-nought, anti-boycott, apesanahkwat, booster shot, cancoillotte, charity shot, cleanup spot, daniil kvyat, diddly-squat, doodly-squat, free thought, gordian knot, high-wrought, i care a lot, jimmy vicaut, juggernaught, lover's knot, mahesh bhatt, mallinckrodt, merrythought, passing shot, racing yacht, roughwrought, sans-culotte, sansculottes, scot and lot, shab-e-barat, shehr-e-zaat, sir lancelot, sitting trot, stopper knot, store-bought, underwrought, watering pot, windsor knot

13 letters:
approach shot, backhand shot, bigg boss ott, black apricot, canister shot, dick advocaat, dried apricot, forehand shot, medical robot, midvinterblot, pale blue dot, robert bilott, sans-culottes, shot-for-shot, truelove knot, vacation spot, weaver's knot

14 letters:
common apricot, expansion slot, kangana ranaut, kristina knott, purple apricot, refractory pot, second thought, sultan of swat, surgeon's knot

15 letters:
basketball shot, deep in thought, fountaine-pajot, good-for-naught, line of thought, powder and shot, pre-dreadnought

16 letters:
abstract thought, fisherman's knot, food for thought, japanese apricot, superdreadnought, train of thought

17 letters:
casablanca-settat, ling-temco-vought, schneider-creusot, school of thought, super-dreadnought, true lover's knot

18 letters:
freedom of thought, johnny-on-the-spot

19 letters:
matthew walker knot, more often than not, revolutions of 1848

21 letters:
saint-jean-cap-ferrat

23 letters:
philadelphia pepper pot

24 letters:
below deck sailing yacht

28 letters:
1980 summer olympics boycott, 1984 summer olympics boycott