use '?' for JOKER (blank)

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

14 letter words

weathercasters[22]

13 letter words

weathercaster[21]

12 letter words

weathercasts[20]

11 letter words

weathercast[19], shearwaters[17], sweethearts[17], restretches[16]

10 letter words

sharewares[16], shearwater[16], sweetheart[16], researches[15], reattaches[15], tracheates[15], chatterers[15], stretchers[15], watercress[15], heartsease[13], earthstars[13], shatterers[13], castraters[12], scatterers[12], streetcars[12]

9 letter words

carwashes[17], eschewers[17], shareware[15], whereases[15], wheatears[15], wreathers[15], thwarters[15], searchers[14], reteaches[14], catharses[14], tracheate[14], chatterer[14], attachers[14], catheters[14], tetrarchs[14], restretch[14], stretcher[14], stretches[14], rehearses[12], reheaters[12], earthstar[12], shatterer[12], aesthetes[12], earthsets[12], seawaters[12], recreates[11], etceteras[11], castrater[11], scatterer[11], streetcar[11], castrates[11], tesseract[11], secretest[11], arrestees[9], stearates[9], resetters[9]

8 letter words

eschewer[16], watchers[16], wretches[16], swatches[16], rewashes[14], aweather[14], wheatear[14], wreather[14], weathers[14], wreathes[14], swathers[14], thrawart[14], thwarter[14], sawteeth[14], strawhat[14], whetters[14], earaches[13], reachers[13], research[13], searcher[13], cheerers[13], charases[13], searches[13], creeshes[13], crashers[13], tracheae[13], tracheas[13], cheaters[13], hectares[13], recheats[13], teachers[13], catarrhs[13], charters[13], recharts[13], escheats[13], starches[13], attacher[13], reattach[13], catheter[13], tetrarch[13], attaches[13], chatters[13], ratchets[13], chastest[13], screwers[13], setscrew[13], rehearse[11], harasser[11], shearers[11], hetaerae[11], reheater[11], hetaeras[11], sheerest[11], sheeters[11], trashers[11], aesthete[11], earthset[11], theaters[11], theatres[11], teethers[11], esthetes[11], shatters[11], seawares[11], swearers[11], seawater[11], teawares[11], waterers[11], sweaters[11], strewers[11], wresters[11], tweeters[11], sweetest[11], swatters[11], caresser[10], creasers[10], recreate[10], caterers[10], recrates[10], retraces[10], terraces[10], erecters[10], reerects[10], secreter[10], caseates[10], cateress[10], cerastes[10], secretes[10], sesterce[10], etcetera[10], acetates[10], castrate[10], teacarts[10], retracts[10], casettes[10], cassette[10], scatters[10], arrestee[8], esterase[8], tesserae[8], asserter[8], reassert[8], serrates[8], terrases[8], steerers[8], stearate[8], retreats[8], treaters[8], resetter[8], estreats[8], restates[8], retastes[8], restarts[8], starters[8]

7 letter words

earache[12], reacher[12], cheerer[12], reaches[12], archers[12], crasher[12], cheeses[12], chasers[12], crashes[12], eschars[12], chaetae[12], hearers[10], rehears[10], shearer[10], sheerer[10], hearses[10], rashers[10], sharers[10], careers[9], creaser[9], casease[9], caesars[9], creases[9], creeses[9], crasser[9], scarers[9], acerate[9], arrases[7], erasers[7]