3 letters:
ade, aid

4 letters:
aide, bade, cade, dade, eyde, fade, gade, hade, haid, heyd, jade, kade, lade, laid, made, maid, paid, raid, wade, waid, zaid

5 letters:
-cade, -made, abade, agade, akkad, apaid, bayed, blade, brade, braid, chaid, cicad, clade, evade, fayed, fraid, glade, grade, hayed, heyde, irade, kaide, kfaed, laide, maide, mayde, niaid, paide, payed, quade, quaid, quayd, raide, rayed, saide, sayed, scade, shade, slade, smade, spade, spaid, spayd, stade, staid, suade, suede, swade, teaed, teyde, theyd, trade, ubaid, ucaid, ulaid, usaid, waide, wayde, wayed, zayde

6 letters:
-grade, abrade, abraid, afraid, alcade, alcaid, ansaid, arcade, aubade, belaid, brayed, calade, caraid, cedade, cidade, clayed, danaid, decade, dekade, enkaid, exjade, flayed, frayed, fumade, grayed, greyed, inlaid, invade, junaid, levade, lyraid, mccade, mcdade, mcdaid, navaid, noraid, obeyed, okayed, parade, played, pomade, prayed, preyed, pureed, relade, relaid, remade, repaid, schade, slayed, sodade, spayde, spayed, splade, splayd, stayed, subaid, swayed, they'd, tirade, togaed, unlade, unlaid, unmade, unpaid, unraid, visaed

7 letters:
aggrade, aillade, alcaide, alcayde, alidade, allayed, andrade, arrayed, assayed, avanade, barbade, barmaid, belayed, boutade, brigade, brimade, brocade, cascade, chamade, charade, cliched, clonaid, cockade, congaed, coolaid, couvade, crusade, danaide, daurade, daymaid, decayed, degrade, delayed, dislade, embayed, embraid, essayed, estrade, falcade, forbade, fougade, gambade, goldade, granade, grenade, imbraid, isonade, kaskade, kincade, kincaid, kinkaid, located, manmade, marcade, mcglade, mcquade, mcquaid, mermaid, mislaid, muscade, neighed, outbade, outlaid, pervade, pochade, pommade, premade, prepaid, ramraid, re-laid, refreyd, regrade, relayed, rhagade, roulade, saccade, sallade, sambaed, saudade, sauteed, schrade, slayed?, splayed, sprayed, strayed, succade, thebaid, tiaraed, tornade, torsade, toupeed, unbraid, unplaid, unstaid, unwayed, upbraid, upgrade, velcade, waylaid, weighed, x-rayed

8 letters:
accolade, adelaide, air-raid, airblade, air raid, al-ubaid, aquacade, austrade, autocade, baignade, balotade, band-aid, band aid, betrayed, bewrayed, beyblade, bigarade, blockade, bondmaid, brandade, brascade, buffeted, camisade, comtrade, conveyed, cookmaid, criseyde, croisade, croupade, deaf-aid, deejayed, defrayed, diarmaid, disgrade, dismayed, dissuade, escapade, escouade, eskapade, estacade, estocade, evercade, eyeshade, fakeraid, filleted, frescade, fusilade, galopade, gatorade, gayblade, get laid, grillade, handmade, handmaid, hellraid, homemade, hoorayed, horn-mad, kerkrade, kool-aid, lechlade, lemonade, leninade, lestrade, limonade, low-paid, luminaid, man-made, marinade, mcquaide, medicaid, microatx, milkmaid, mouclade, new-laid, new-made, old maid, overlade, overlaid, overpaid, palakkad, palisade, parlayed, patinaed, pavesade, paygrade, persuade, piperade, poivrade, postpaid, powerade, prograde, purveyed, remicade, remolade, renegade, replayed, retirade, rmoulade, roqueted, sashayed, sea-maid, selfmade, serenade, sleighed, sol-faed, starcade, starmade, stoccade, stockade, subgrade, sun-maid, surveyed, tapenade, teasmade, twyblade, unafraid, underaid, ungerade, unplayed, unprayed, unrepaid, unstayed, unswayed, warblade, wateraid

9 letters:
actionaid, ambuscade, antegrade, antitrade, band-maid, barricade, barrikade, bastinade, benchmade, bridemaid, cablelaid, camp-made, cannonade, carbonade, carronade, cavalcade, cha-chaed, chaminade, chokolade, citigrade, colonnade, cornbraid, cottonade, couragejd, cowparade, cricklade, crocheted, croqueted, crosseyed, crossfade, dairymaid, deep-laid, digigrade, disobeyed, displayed, downgrade, ebrillade, estrapade, everglade, fairtrade, fake-raid, fan blade, fightcade, first-aid, first aid, flowblade, freetrade, fusillade, gabionade, gallopade, gasconade, greillade, holidayed, home-made, housemaid, interlaid, inveighed, karbonade, lampshade, low-grade, marmalade, mascarade, mascaraed, maskerade, metrodade, misplayed, misstayed, moonglade, motorcade, nursemaid, outplayed, outstayed, overlayed, overshade, overstaid, overtrade, parqueted, pistolade, portrayed, portslade, posigrade, post-paid, promenade, questrade, raffinade, readymade, reformade, remoulade, resprayed, schublade, scottrade, self-made, sexcapade, snowblade, starrcade, taligrade, tamponade, tastemade, toadshade, top-grade, twayblade, unallayed, unarrayed, unassayed, undecayed, underlaid, underpaid, unessayed, unsprayed, unweighed, verandaed, well-made, well-paid, windblade

10 letters:
autostrade, balustrade, barraclade, bastonnade, biodegrade, bousculade, bridesmaid, cable-laid, carbonnade, causewayed, centigrade, chiffonade, ciliograde, cirrigrade, cross-fade, disarrayed, dodi fayed, dorsigrade, downplayed, dragonnade, dragoonade, flanconade, free trade, fuckparade, gabionnade, gold braid, gravigrade, gymnasiade, high-grade, human-made, intergrade, jack quaid, jetsonmade, judge-made, kate spade, kitchenaid, lamp shade, leaf blade, marat/sade, masquerade, mastizaade, mazarinade, microblade, motortrade, mouth-made, multigrade, mutual aid, nightshade, orthograde, orthostade, outweighed, overplayed, overstayed, palmigrade, parlormaid, persillade, peter gade, physograde, pinnigrade, plain-laid, pronograde, pulmograde, razorblade, ready-made, reconveyed, rectigrade, reply-paid, retrograde, ricocheted, rognonnade, rubbermaid, rudy guede, saltigrade, schokolade, schoolmaid, tailormade, tardigrade, taylormade, twice-laid, ultrasuede, unbetrayed, undismayed, unsurveyed, water-laid, witchblade

11 letters:
aethelflaed, anterograde, arquebusade, athanokkade, biggleswade, chambermaid, chiffonnade, custom-made, demibrigade, digitigrade, ditch spade, fanfaronade, federal-aid, first grade, foreign aid, handgrenade, hawser-laid, hearing aid, horse trade, kitchenmaid, knife blade, lady's maid, lancepesade, laterigrade, medical aid, mispersuade, not delayed, overweighed, parlourmaid, peyrelevade, phylloclade, plantigrade, robinsonade, roe v. wade, role-played, rollerblade, rotor blade, shroud-laid, sick parade, slave trade, spiny-rayed, switchblade, tailor-made, toucharcade, unbarricade, underplayed, unguligrade, universiade, unpathwayed, wiper blade, wolfbrigade

12 letters:
concertinaed, countertrade, death parade, degringolade, double-shade, factory-made, fire brigade, garden spade, grant-in-aid, hand-grenade, hand grenade, harlequinade, junior-grade, lamonte wade, machine-made, nurse's aide, nursing aide, overpersuade, penny arcade, purpose-made, rudder blade, social blade, teaching aid, universidade, waiting-maid, window shade

13 letters:
fifth crusade, financial aid, first crusade, grants-in-aid, johnny mcdaid, mazar-e-quaid, rifle grenade, shoulderblade, sixth crusade, smoke grenade, third crusade, utility-grade, weapons-grade, youth crusade

14 letters:
carriage trade, doolittle raid, fourth crusade, naval blockade, rebeca andrade, second crusade, shoulder blade

15 letters:
audiovisual aid, ball nightshade, sargon of akkad, seventh crusade, technical-grade

16 letters:
balance of trade, black nightshade, naked and afraid, orange marmalade, the sun's tirade, woody nightshade

17 letters:
common nightshade, deadly nightshade, degree centigrade, military blockade, purple nightshade

19 letters:
climbing nightshade, stinking nightshade

20 letters:
atlantic slave trade, poisonous nightshade

21 letters:
drinking the kool-aid

22 letters:
bittersweet nightshade, enchanter's nightshade

23 letters:
lieutenant junior grade

27 letters:
charge of the light brigade

28 letters:
miss kobayashi's dragon maid

29 letters:
alpine enchanter's nightshade

33 letters:
combination in restraint of trade

38 letters:
general agreement on tariffs and trade