use '?' for JOKER (blank)

From letters W, A, T, E, R, T, I, G, H, T, N, E, S, S  I made following words

14 letter words

watertightness[21]

11 letter words

weatherings[18], straightens[15], straightest[15], anesthetist[14], interstates[11]

10 letter words

weathering[17], watertight[17], swarthiest[16], sweatshirt[16], twentieths[16], garnishees[14], shattering[14], straighten[14], retightens[14], tighteners[14], earthiness[13], heartiness[13], antitheses[13], hesitaters[13], earwitness[13], wateriness[13], stingarees[11], argentites[11], estreating[11], integrates[11], interstage[11], strategies[11], strategist[11], reinstates[10], interstate[10], enstatites[10], intestates[10], satinettes[10]

9 letter words

greenwash[16], rewashing[16], nightwear[16], wreathing[16], weighters[16], thwarting[16], waterhens[15], whiteners[15], enswathes[15], inswathes[15], whiteness[15], wrathiest[15], twentieth[15], whittrets[15], garnishee[13], shagreens[13], garnishes[13], shearings[13], reheating[13], heritages[13], ingathers[13], sheetings[13], sightseen[13], sightseer[13], rightness[13], threating[13], retighten[13], tethering[13], tightener[13], gnathites[13], teethings[13], tightness[13], straights[13], strengths[13], seesawing[13], waterings[13], westering[13], sweetings[13], rewetting[13], twangiest[13], herniates[12], asthenies[12], hasteners[12], tarnishes[12], earthiest[12], heartiest[12], hesitater[12], threatens[12], thirteens[12], hesitates[12], earthsets[12], trashiest[12], weariness[12], wasteries[12], witnesser[12], wateriest[12], sweatiest[12], strawiest[12], agentries[10], gratinees[10], reseating[10], stingaree[10], greasiest[10], estranges[10], greatness[10], sergeants[10], asserting[10], astringes[10], ganisters[10], argentite[10], integrate[10], aigrettes[10], restating[10], retasting[10], resetting[10], retesting[10], grisettes[10], strangest[10], tattering[10], attesting[10], gnattiest[10], arsenites[9], irateness[9], resinates[9], stearines[9], teariness[9], reinstate[9], anisettes[9], tetanises[9], sestertia[9], treatises[9], resistant[9], straitens[9], tartiness[9], insetters[9], interests[9], sternites[9], triteness[9], enstatite[9], intestate[9], satinette[9], steatites[9], tattiness[9], attesters[9], straitest[9]

8 letter words

shagreen[12], hearings[12], hearsing[12], shearing[12], greenish[12], rehinges[12], sheering[12], heritage[12], earthing[12], hearting[12], ingather[12], thenages[12], gahnites[12], seething[12], sheeting[12], greenths[12], trashing[12], sightsee[12], stengahs[12], reshines[11], herniate[11], hearties[11], hastener[11], heartens[11], hairnets[11], inearths[11], therians[11], esthesia[11], antheses[11], anergies[9], gesneria[9], agenesis[9], assignee[9], assigner[9], reassign[9], seringas[9], greisens[9], gratinee[9], interage[9], estrange[9], grantees[9], greatens[9], negaters[9], reagents[9], sergeant[9], angriest[9], astringe[9], ganister[9], gantries[9], granites[9], ingrates[9], rangiest[9], gentries[9], integers[9], reesting[9], steering[9], arenites[8], arsenite[8], resinate[8], stearine[8], trainees[8]