2 letters:
ct

3 letters:
ort

4 letters:
bort, cort, dort, fort, gort, kort, mort, ohrt, port, sort, tort, wart

5 letters:
abort, boart, borte, chort, corte, dorte, foret, forte, hjort, korte, norte, porte, quart, scort, short, skort, snort, sorte, sourt, sport, stort, swart, torte, tsort, vport, whort, zwart

6 letters:
adhort, alport, assort, besort, cavort, courte, deport, detort, dfsort, enhort, escort, exhort, extort, hycort, import, intort, laport, mccort, q-sort, quarte, report, resort, retort, shortt, stuart, tatort, tchort, thwart, vorort

7 letters:
accourt, airport, alamort, allport, athwart, banwart, bayport, bistort, bitport, carport, comport, consort, contort, desport, disport, distort, escorte, fraport, geoport, gosport, gumport, importe, jetport, keyport, laforte, lamport, laporte, mccourt, outport, presort, purport, re-sort, resorte, ressort, rowport, seaport, somport, soporte, support, symport, timsort, uniport, upcourt, vanwart, yogourt

8 letters:
888sport, aeroport, ala-cort, altiport, anteport, antiport, azmacort, backport, beatport, beauport, belcourt, bellport, bogosort, bridport, coalport, colocort, consorte, eastport, fairport, fleawort, freeport, goncourt, harcourt, heapsort, heliport, homeport, hovawart, kenacort, lakeport, langport, lawcourt, lefcourt, lockport, maryport, massport, millport, nieuport, nimporte, outcourt, outsport, passport, precourt, qazsport, rancourt, rapaport, redshort, reexport, reimport, rockport, slowsort, stolport, suitport, synacort, teleport, two-port, uhlsport, valcourt, vancourt, westport, yoghourt

9 letters:
agincourt, arracourt, autosport, azincourt, backcourt, bogo-sort, borgwardt, davenport, delaporte, downcourt, eurosport, foliomort, forecourt, foreswart, gegenwart, half-port, hardcourt, hot-short, hoverport, introsort, jeancourt, kingsport, livesport, locksport, micromort, misreport, multiport, northport, paperport, pasaporte, quicksort, red-short, sallyport, shellsort, southport, spaceport, stockport, superport, swissport, talksport, touggourt, transport, vertiport, voldemort, worrywart

10 letters:
all-a-mort, aristocort, base-court, bloodsport, bridgeport, cassaforte, cold-short, crosscourt, dancesport, do-support, dovercourt, e-passport, frontcourt, intersport, littleport, mckeesport, motorsport, multisport, nonsupport, overthwart, rockresort, roufusport, sally-port, shreveport, spoilsport, sternwarte, templeport, three-port, transporte, travelport, ultrashort, vandervort, watersport, winterport

11 letters:
billancourt, cotransport, coudersport, counterfort, deflazacort, displayport, feuillemort, futuresport, newburyport, renforshort, sachertorte, stupid-sort, teledeporte, underreport

12 letters:
life-support, mistransport, out-of-court, self-support, shippingport, vaillancourt, williamsport

13 letters:
cambridgeport, containerport, kennebunkport, lufttransport, opentransport

14 letters:
hypertransport, mordaunt-short

15 letters:
kindertransport

16 letters:
countertransport

18 letters:
prinzregententorte

20 letters:
boulogne-billancourt

23 letters:
saint-jean-pied-de-port

3 letters:
art

4 letters:
cart, curt, dart, mart, dirt, girt, hurt, bert, fart, part, pert, hart, bart, burt, tart, kurt

5 letters:
chart, avert, chert, alert, blurt, skirt, smart, carte, apart, spirt, overt, exert, start, quirt, inert, flirt, heart, shirt, spurt

6 letters:
divert, revert, invert, impart, desert, depart, assert, squirt, turret, insert, unhurt, ecarte, udmurt

7 letters:
convert, restart, concert, dessert, pervert, compart, subvert, astarte, subpart, unalert, yoghurt

8 letters:
reassert

9 letters:
descartes, extravert, overexert, reconvert, set-apart

10 letters:
disconcert, animadvert